Few garden flowers have developed such a strong association with traditional herbal skincare as calendula.
Its bright yellow and orange flower heads bring colour to gardens, attract pollinating insects and provide an ingredient used in traditional herbal preparations, infused oils and modern skin-care products. Its petals have also been used in cooking and as a source of natural colouring, giving the plant a place in both the kitchen and the herbal cabinet.
Known botanically as Calendula officinalis, calendula is commonly called pot marigold. It has a long history of cultivation across Europe and the Mediterranean region, where its vivid flowers and practical uses helped establish it as a familiar garden herb.
Today, calendula appears in creams, ointments, infused oils, dried flowers, herbal infusions and other preparations. Its chemistry has attracted scientific investigation, particularly compounds associated with the flower's colour and extracts studied for their biological activity.
However, its reputation for soothing and protecting the skin should be understood alongside the available evidence. European regulatory assessments recognise certain calendula flower preparations for traditional use in minor skin inflammation, minor wounds and minor inflammation of the mouth and throat, but these conclusions are based primarily on longstanding use rather than sufficient clinical trials to establish effectiveness conclusively.
Understanding calendula means looking beyond its bright petals. Its botanical identity, cultural history, culinary applications, chemical constituents, modern evidence and safety all contribute to a fuller picture of this versatile plant.
Calendula at a glance
Common name: Calendula, pot marigold, common marigold, garden marigold
Scientific name: Calendula officinalis L.
Plant family: Asteraceae, the daisy family
Plant type: Annual or biennial herbaceous plant
Native range: Western Mediterranean region, according to Kew's botanical classification
Part commonly used in herbal preparations: Flowers and flowering heads
Characteristic appearance: Yellow to deep orange flower heads with numerous overlapping petals
Important constituents: Carotenoids, flavonoids, triterpenoids, triterpene saponins, polysaccharides and volatile compounds
Common forms: Fresh flowers, dried flowers, infusions, infused oils, creams, ointments and extracts
Culinary uses: Edible petals, salads, garnishes, rice dishes, soups and natural colouring
Traditional associations: European herb gardens, topical preparations, culinary colouring and traditional herbal skincare
Modern research interests: Skin preparations, wound-related outcomes, inflammation and the chemistry of flower extracts
Calendula belongs to the same botanical family as chamomile, echinacea, dandelion and milk thistle. These plants share the characteristic composite flower-head structure of the Asteraceae family, although their chemistry, traditional uses and evidence bases differ.
For botanical reference, see Kew Science — Calendula officinalis.
First, what exactly is calendula?
Calendula is a flowering plant in the genus Calendula, a group of plants associated primarily with Europe, the Mediterranean region and neighbouring areas.
The best-known species, Calendula officinalis, is an annual or biennial herb that produces branching stems, green leaves and prominent flower heads in shades ranging from pale yellow to deep orange.
Its flowers are responsible for most of its culinary and traditional herbal uses.
The plant is relatively easy to grow under suitable conditions, and its long flowering period has helped make it a popular choice for gardens across many regions.
The distinctive flower head
Like other members of the daisy family, calendula does not produce a single simple flower in the way the word might suggest.
Each flower head, or capitulum, contains numerous individual flowers arranged together to form what appears to be one bloom.
The outer, petal-like structures are called ray florets, while the centre contains smaller tubular disc florets.
These structures contribute to the plant's distinctive appearance and provide the framework for its reproduction.
Calendula flower heads can vary considerably in size, petal arrangement and colour. Some cultivars have relatively simple flower heads with one main ring of ray florets, while others have many layers of petals that create a fuller appearance.
These horticultural differences are one reason calendula is so widely used as an ornamental plant.
Why the petals are yellow and orange
Calendula's colour comes largely from naturally occurring pigments, especially carotenoids.
These compounds are also found in many other colourful plants, including carrots, tomatoes and various yellow or orange flowers.
The particular pigments and their relative concentrations help determine the final colour of the flower head.
Orange cultivars may have a different carotenoid profile from pale yellow cultivars, and the composition can vary with genetics, growing conditions and the stage of flowering.
These pigments contribute to calendula's value as a natural colouring ingredient, as well as its visual appeal.
The leaves and stems
Calendula leaves are generally green, oblong to lance-shaped and sometimes slightly hairy or sticky to the touch.
They are arranged alternately along the stem, rather than in opposite pairs as in peppermint and lemon balm.
The stems branch as the plant grows, allowing several flower heads to develop.
Although the foliage can help identify the plant, the scientific identity should not be established from one feature alone. Closely related plants and other garden marigolds can share some visual similarities.
Calendula is not the same as every other marigold
One of the most important distinctions in calendula identification concerns the common name marigold.
The word is used for plants belonging to more than one genus, particularly Calendula and Tagetes.
Pot marigold — Calendula officinalis
This is the plant covered in this guide.
It produces yellow or orange flowers and has a long history in European herbal traditions, food preparation and ornamental gardening.
The flowers are also the principal material used in the traditional calendula medicinal preparations assessed by the European Medicines Agency.
French and African marigolds — Tagetes species
Plants such as French marigold (Tagetes patula) and African marigold (Tagetes erecta) belong to a different genus.
These species are widely cultivated as ornamentals and have their own horticultural and chemical characteristics.
Although both Calendula and Tagetes belong to the Asteraceae family, they should not automatically be treated as interchangeable ingredients.
Their chemistry, traditional applications and product specifications may differ.
When buying calendula for herbal use, look for the scientific name Calendula officinalis. The common name marigold alone is not sufficiently precise.
What does the name calendula mean?
The name Calendula has a connection with the Latin word calendae, referring to the first day of a month in the Roman calendar.
The precise reason the name was chosen is uncertain. One historical botanical explanation suggested that it might reflect the plant's tendency to remain in flower over many months in favourable conditions.
This is an interesting possibility rather than a definitively established explanation.
The species name officinalis has a clearer historical association with medicinal plants.
It has traditionally been applied to plants recognised for practical uses, especially those kept or prepared within apothecaries and other medicinal settings.
Together, the scientific name reflects calendula's longstanding place in cultivated gardens and herbal literature.
Pot marigold and its historical names
Calendula has been known by numerous common names, including pot marigold, garden marigold, common marigold and Mary's gold.
The name pot marigold reflects the plant's historical culinary associations: its flowers were used in food preparation, including as a colouring ingredient.
Mary's gold reflects a religious and cultural tradition connecting golden flowers with the Virgin Mary.
These names show how a single plant can acquire different identities according to its appearance, practical uses and cultural associations.
Where does calendula originate?
Kew's Plants of the World Online database records Calendula officinalis as native to the western Mediterranean region, with Spain listed within its native range.
Its precise early history is difficult to reconstruct because calendula has been cultivated for a long time and has become widely naturalised beyond its original distribution.
The species is now grown in gardens across Europe, Asia, Australasia, Africa and the Americas.
Its success outside its original range reflects its suitability for cultivation and the value people have placed on its flowers.
From Mediterranean plant to garden favourite
Calendula grows well in suitable temperate environments and can flower for an extended period when conditions are favourable.
Its bright blooms are easy to recognise, and the plant can be grown in beds, borders and containers.
These characteristics helped it become established in gardens long before the modern market for herbal creams and botanical skincare products developed.
Its usefulness also extended beyond appearance. Calendula flowers could be harvested for colouring and culinary preparation, while the dried flowers became a familiar ingredient in traditional herbal products.
This combination of ornamental, culinary and practical value helps explain its enduring popularity.
Calendula in New Zealand
Kew records Calendula officinalis as introduced in both the North and South Islands of New Zealand.
It is cultivated as a garden flower and can grow in suitable local conditions.
New Zealand's climate varies significantly between regions, so flowering patterns and growing success depend on sunlight, rainfall, soil and local temperatures.
For home gardeners, calendula offers a combination of visual appeal, value to pollinating insects and the potential for culinary use when suitable plants have been grown and handled appropriately.
As with any introduced plant, gardeners should manage self-seeding and follow local horticultural guidance.
For further information, see Kew Science — Calendula distribution.
Calendula in ancient and medieval traditions
Calendula has a long history of cultivation and traditional use, although its earliest botanical history is not entirely clear.
Historical references to marigold-like plants can be difficult to interpret because ancient plant names did not follow modern botanical classification.
A reference to a golden flowering plant in an early text does not necessarily identify Calendula officinalis with certainty.
Nevertheless, calendula became a familiar plant in European and Mediterranean herbal traditions, where its flowers were valued for their colour and use in household preparations.
A plant with practical uses
Calendula's bright flowers made it noticeable in gardens, while its ability to grow under suitable conditions meant that people could cultivate it relatively easily.
The petals could be incorporated into foods or used to provide colour, and the flower heads became associated with traditional preparations.
These uses were not confined to medicinal practice.
Calendula could be grown as an ornamental, used to decorate dishes, harvested for household purposes or dried for later use.
Its versatility helped establish it as a familiar garden herb.
Calendula in European herbals
European herbal literature recorded calendula among the plants used in traditional preparations.
The flowers were associated with various historical applications, including topical preparations and other household remedies.
Over time, dried calendula flowers became a familiar botanical ingredient in herbal dispensaries.
However, the medical theories that informed historical herbal literature differed substantially from modern clinical science.
Historical descriptions tell us what people used a plant for, how they prepared it and how they understood its properties. They do not automatically establish that each use is effective according to modern clinical standards.
This distinction is especially important when interpreting traditional skin applications.
Calendula and the history of natural colouring
One of calendula's most practical historical features is its vivid pigment.
The flowers contain carotenoids and other compounds that contribute to their yellow-orange colour, making them suitable for colouring some foods and preparations.
Calendula in cooking
The petals have historically been used as a colouring ingredient in soups and other dishes.
Their pigment can give food a warm yellow or golden appearance, although the effect depends on the quantity used and the nature of the dish.
Calendula has sometimes been called “poor man's saffron” because its flowers can contribute yellow colour to food.
However, calendula is not a substitute for saffron in botanical identity, aroma or flavour. Saffron comes from the stigmas of Crocus sativus, a different plant with a distinct chemical profile.
The comparison refers primarily to colouring, not equivalence.
Calendula petals as a food ingredient
The petals can be used fresh or dried in culinary preparations, provided they come from correctly identified, food-suitable material.
They can be incorporated into salads, used as a garnish or added to selected recipes where a gentle floral note and bright colour are desirable.
The flavour is generally mild and may be slightly bitter, depending on the plant and preparation.
For food use, calendula grown specifically for culinary purposes is preferable to ornamental flowers treated with pesticides or other products not intended for edible plants.
Colour, chemistry and preparation
Calendula's colour is primarily associated with carotenoids, a broad family of pigments that are often yellow, orange or red.
These compounds vary in their solubility and behaviour during processing.
For example, the colour extracted into a fat-containing preparation may differ from what appears when petals are steeped in water.
Drying, storage and exposure to light can also affect the appearance and quality of the flower material.
This is one reason the way calendula is processed matters just as much as its botanical identity.
Calendula in traditional herbal skincare
Calendula is most widely recognised today for its association with topical herbal preparations.
Dried flowers are used to make infusions, while other preparations use solvents such as ethanol or carrier oils to extract selected constituents.
These materials can then be incorporated into creams, ointments and other products intended for application to the skin.
Traditional topical use
European herbal traditions have used calendula flower preparations for minor skin complaints.
The European Medicines Agency has assessed calendula flower medicines and recognises their traditional use for minor skin inflammation, such as sunburn, and as an aid in healing minor wounds.
The agency also recognises specified traditional uses for minor inflammation of the mouth and throat.
Importantly, these conclusions are based on longstanding traditional use, not sufficient clinical-trial evidence to establish effectiveness conclusively.
The EMA considered clinical studies involving conditions such as burns, leg ulcers and skin inflammation, but concluded that problems with study design prevented firm conclusions.
See the European Medicines Agency — Calendula flower.
Why traditional use remains relevant
Traditional use provides information about how a plant has been prepared and applied over time.
It can help identify preparations and outcomes that are worth studying more carefully.
However, it does not answer every question about effectiveness, dosage, formulation or safety.
A traditional calendula oil, an aqueous infusion and a modern cream containing a standardised extract can have different chemical profiles.
The evidence for one preparation cannot automatically be applied to every product marketed under the name calendula.
Infused oils and ointments
Calendula-infused oil is commonly made by allowing prepared flower material to infuse in a carrier oil.
The resulting product differs from an essential oil obtained by steam distillation. Calendula's traditional oil preparations are generally based on extracting constituents into a fixed oil rather than producing a concentrated volatile oil.
The infused oil may then be incorporated into balms, ointments or other topical formulations.
The final product's characteristics depend on the starting material, the carrier oil, extraction conditions, filtration, storage and any additional ingredients.
This distinction matters when evaluating both product quality and the research available for a particular preparation.
What is inside calendula?
Calendula's flowers contain a diverse mixture of naturally occurring compounds.
Modern phytochemical research has identified carotenoids, flavonoids, triterpenoids, triterpene saponins, polysaccharides and volatile constituents.
The proportions vary according to cultivar, growing conditions, harvest stage and extraction method.
The colour, aroma and chemical characteristics of calendula therefore reflect several interacting groups of compounds rather than one single active ingredient.
Carotenoids: the golden pigments
Carotenoids are responsible for much of calendula's yellow and orange colouring.
They are also present in many other plants, including carrots, pumpkins and certain flowering species.
Different carotenoids absorb and reflect light differently, contributing to the range of colours observed in flowers and fruits.
In calendula, the composition and amount of carotenoids can vary according to cultivar and flower colour.
These compounds help explain the plant's value as a natural colouring ingredient.
However, the presence of carotenoids in calendula does not automatically establish the nutritional or clinical effect of a particular calendula product.
Flavonoids
Calendula contains flavonoids, a large group of naturally occurring plant compounds.
Several flavonoids and related derivatives have been identified in its flower material.
These compounds are frequently investigated in phytochemical studies because of their biological activity in laboratory experiments.
However, laboratory activity is not equivalent to a demonstrated clinical benefit in humans.
The quantity extracted into a finished product depends on the starting material and processing method, and the compounds may behave differently in the body from how they behave in an experimental system.
Triterpenoids
Triterpenoids are another important group of calendula constituents.
Certain triterpenoids and related compounds have been investigated in laboratory studies involving inflammatory and other biological processes.
Some of these substances are associated with calendula's non-volatile chemical fraction and may be present in particular solvent extracts.
However, the concentration of triterpenoids depends on how the flower material is processed.
A water-based infusion, a fixed-oil infusion and an alcohol-based extract will not necessarily contain the same proportions of these constituents.
Triterpene saponins
Calendula also contains triterpene saponins, which are naturally occurring compounds found in various plants.
Their chemical structures differ from those of carotenoids and flavonoids, and they contribute to the wider complexity of calendula's phytochemistry.
As with other plant compounds, findings involving isolated saponins should not automatically be interpreted as evidence that whole calendula preparations provide the same effects.
Polysaccharides and volatile compounds
Polysaccharides and volatile aromatic compounds are also reported in calendula.
Polysaccharides are larger molecules composed of linked sugar units, while volatile constituents contribute to the flower's aroma.
Their relative amounts depend on the plant material and the analytical method used.
These differences illustrate why a single ingredient name does not fully describe the chemical composition of a finished herbal product.
For an overview, see the scientific review A review on phytochemistry and ethnopharmacological aspects of the genus Calendula.
What does modern research say about calendula?
Calendula has been investigated in laboratory research and a number of clinical studies, especially those involving topical preparations.
Researchers have examined its chemical constituents and possible effects in relation to skin inflammation, wound-related outcomes and other applications.
However, the quality and consistency of the evidence vary considerably.
The European Medicines Agency's assessment remains particularly useful because it evaluates calendula flower medicines within a defined regulatory framework.
Calendula and minor skin inflammation
Calendula is widely used in skin-care products intended for minor irritation and inflammation.
Some experimental studies have reported biological activity associated with calendula extracts, including effects on pathways relevant to inflammatory processes.
Clinical studies have also examined calendula preparations in relation to skin conditions.
However, the evidence is not strong enough to conclude that all calendula products reliably treat skin inflammation.
Differences in extract composition, product formulation, study population and research design make it difficult to compare results.
The EMA recognises certain calendula flower preparations for traditional use in minor skin inflammation, but explicitly notes that the clinical studies it reviewed did not provide sufficient evidence to draw firm conclusions.
Calendula and wound healing
Calendula is traditionally used as an aid in healing minor wounds.
This use has attracted research interest, including investigations involving topical applications and wound-related outcomes.
However, evidence from laboratory studies or small clinical trials does not automatically establish that a particular calendula cream speeds healing in all wound types.
The distinction between minor superficial wounds and complex injuries is particularly important.
A product intended for minor skin use should not replace proper treatment of a deep wound, a significant burn, an infected injury or another condition requiring medical assessment.
The EMA's traditional-use conclusion applies to the specified medicinal preparations and should not be interpreted as proof that every calendula cream or infused oil has clinically established wound-healing effects.
Calendula and radiation-related skin reactions
Some clinical studies have investigated calendula preparations in people undergoing radiotherapy, including products intended to address skin reactions.
Results have been mixed, and study limitations make it difficult to draw general conclusions.
A particular preparation used in a radiotherapy study cannot automatically be treated as equivalent to an ordinary calendula ointment bought for home use.
People undergoing cancer treatment should discuss topical products with their clinical team, particularly when skin changes arise during treatment.
Calendula and mouth or throat inflammation
The EMA recognises traditional use of specified calendula flower preparations for minor inflammation of the mouth and throat.
This may involve preparations formulated as infusions for appropriate application to the affected area.
The recognition is based on traditional use rather than sufficient clinical trials to establish effectiveness conclusively.
Persistent mouth ulcers, severe throat pain, difficulty swallowing or other significant symptoms warrant professional assessment rather than indefinite self-treatment.
What can we conclude?
Calendula has a long history of traditional topical use and a scientifically interesting chemical profile.
Some experimental and clinical studies have produced findings worth investigating further, but the evidence is not sufficient to establish the effectiveness of every proposed use or product.
Calendula's traditional reputation for skin care should not be confused with definitive clinical proof that it heals wounds or treats skin disease.
The most responsible approach is to consider the particular preparation, the intended application, the quality of the evidence and the person's circumstances.
Dried flowers, infused oil, creams and extracts: why the differences matter
Calendula products can differ significantly because they are made using different parts of the flower and different processing methods.
Understanding the form of a preparation helps clarify what it contains and whether a particular research finding is relevant.
Dried calendula flowers
Dried flower heads are used in traditional herbal preparations and may be incorporated into infusions or other products.
The material contains the plant's natural mixture of pigments and other constituents, although drying can affect its colour, aroma and chemical composition.
Storage conditions are also important because moisture, heat and light can compromise product quality.
Calendula infusion
An infusion is made by steeping prepared flowers in hot water.
It extracts certain water-soluble constituents, producing a preparation that differs chemically from an oil infusion or concentrated extract.
Traditional calendula infusions may be used in products intended for specific topical or mouth-and-throat applications.
The preparation method and product instructions matter, particularly when a product is intended for application to damaged skin or mucosal surfaces.
Calendula-infused oil
An infused oil is made by transferring constituents from flower material into a carrier oil.
This process can extract some oil-soluble compounds and pigments, but its chemical profile differs from that of an aqueous infusion.
A calendula-infused oil is also different from a concentrated essential oil.
The carrier oil, flower material, extraction conditions and storage all influence the finished product.
Creams and ointments
Topical creams and ointments combine calendula preparations with other ingredients to produce a finished product with defined physical properties.
The formulation affects texture, stability, spreading and the way the ingredients are delivered to the skin.
A cream containing a calendula extract cannot automatically be considered equivalent to a simple infused oil, even when both products use the same botanical source.
Concentrated extracts
Extracts are made using solvents that separate selected constituents from the starting material.
The solvent, temperature, extraction ratio and manufacturing process influence the final chemical profile.
Standardisation can provide more consistent information about selected constituents, but it does not by itself establish clinical effectiveness.
The botanical name identifies the source plant; the preparation determines much of what the finished product contains.
How to choose calendula thoughtfully
Whether you are purchasing calendula for cooking, dried flowers or a topical product, several checks can help you understand what you are buying.
Check the botanical name
Look for Calendula officinalis when this is the intended species.
This helps distinguish pot marigold from Tagetes species, which are also commonly called marigolds.
Identify the preparation
Is the product dried flower material, an infusion, a fixed-oil infusion, a cream, an ointment or a concentrated extract?
These are different preparations and may not have equivalent properties or evidence.
Check the intended use
A product intended as a food ingredient is not automatically appropriate as a medicinal topical preparation.
Likewise, a topical product should not automatically be used in the mouth or on a wound unless its instructions specify that application.
Read the ingredient list
Topical products may contain carrier oils, preservatives, fragrances or other botanical ingredients.
These ingredients can influence tolerability and the possibility of irritation or allergy.
A clear label makes it easier to understand the finished product rather than assuming that calendula is its only relevant ingredient.
Look for transparent quality information
Useful information may include the manufacturer, botanical identity, plant part, batch identification and relevant quality testing.
For concentrated extracts, the extraction method and any standardisation details can help explain what the product contains.
Be cautious with claims
Claims that calendula cures skin disease, guarantees wound healing or replaces appropriate wound care should be approached critically.
Traditional-use recognition is not equivalent to conclusive clinical proof, and findings from one preparation cannot automatically be applied to every calendula product.
Growing calendula in the garden
Calendula is a popular garden plant because it combines bright flowers with relatively straightforward cultivation.
It can be grown in garden beds, borders and containers, and its flowers provide visual interest as well as a resource for pollinating insects.
Growing conditions
Calendula generally grows well in a sunny position with reasonably fertile, well-drained soil.
It can tolerate a range of temperate conditions, although prolonged heat, waterlogging and other stresses can influence growth and flowering.
Depending on climate and planting time, calendula may behave as an annual or short-lived biennial.
Flowers and pollinators
The flower heads attract insects, including bees and other pollinators.
This makes calendula a useful addition to gardens designed to provide flowering plants throughout the growing season.
Different cultivars produce different flower colours and forms, so the plant can be selected for either ornamental appeal or other intended uses.
Harvesting calendula flowers
Flowers intended for culinary or herbal use should come from plants that have been correctly identified and grown under suitable conditions.
Flowers from ornamental nursery plants should not automatically be assumed appropriate for food or medicinal use because treatments used in production may not be intended for human consumption.
For drying, the flower material should be handled carefully and dried appropriately to reduce the risk of spoilage and preserve quality.
Finished dried material should be stored in conditions that protect it from moisture and excessive light.
Calendula in New Zealand
Calendula can be cultivated in suitable gardens throughout many parts of New Zealand, although growing conditions vary by region.
Its ability to flower under a range of temperate conditions has helped it become a familiar garden plant.
Because it can self-seed in favourable environments, gardeners may find new plants appearing after flowering. This is often manageable through harvesting and regular garden maintenance.
Anyone growing calendula for food or herbal preparation should keep clear records of plant identity and avoid using material from plants treated with products that are unsuitable for the intended use.
Calendula safety: what should you know?
Calendula is widely used in topical products and culinary preparations, but it is not automatically suitable for everyone or every application.
Safety depends on the product, its concentration, the route of use and the individual's circumstances.
Allergies and skin sensitisation
Calendula belongs to the Asteraceae family, alongside plants such as chamomile, echinacea, milk thistle and ragweed.
People with known allergies to calendula or other members of this family should be particularly cautious.
The European Medicines Agency states that calendula flower medicines must not be used by people who are hypersensitive to Asteraceae plants.
Skin sensitisation has also been reported, although its frequency is not known.
An unexpected rash, itching or worsening irritation after applying a calendula product should not be dismissed simply because the product is described as natural.
Minor skin complaints and wounds
The EMA recognises certain calendula flower preparations for traditional use in minor skin inflammation and as an aid in healing minor wounds.
These conclusions apply to defined herbal medicinal preparations and do not establish that every calendula cream or infused oil is suitable for any skin condition.
Deep wounds, serious burns, infected injuries or symptoms that worsen require appropriate medical care.
The EMA advises that a doctor or qualified healthcare practitioner should be consulted if symptoms worsen or persist for longer than one week when using the assessed preparations.
Mouth and throat preparations
Certain calendula flower preparations have traditional use for minor inflammation of the mouth and throat.
The EMA's recommendations apply to patients over 12 years of age for this intended use.
Persistent oral lesions, difficulty swallowing, significant throat pain or other concerning symptoms should be assessed by an appropriate healthcare professional.
A product intended for topical skin application should not automatically be used inside the mouth.
Pregnancy and breastfeeding
Reliable safety information concerning medicinal calendula preparations during pregnancy and breastfeeding is limited.
Culinary use and concentrated medicinal products should not automatically be treated as equivalent.
People who are pregnant or breastfeeding should seek appropriate advice before using concentrated calendula products.
Children
The EMA's recommendations for the assessed calendula flower medicines specify use in patients over six years of age for minor skin inflammation and minor wounds, and over 12 years of age for minor mouth or throat inflammation.
These restrictions apply to the relevant medicinal preparations and should not be generalised to every product without considering its specific instructions.
Products intended for children should be used according to their labelled directions and appropriate professional advice.
Food use and product quality
Calendula petals can be used in food when correctly identified and produced for that purpose.
However, flowers grown purely for ornamental use may have been exposed to pesticides or other treatments unsuitable for food.
Edibility should not be inferred from appearance alone.
For culinary use, obtain appropriately grown material and handle it hygienically.
The enduring appeal of calendula
Calendula occupies an unusual position between the garden, the kitchen and the herbal cabinet.
Its orange and yellow flowers have made it a familiar ornamental plant, while its petals provide colour and a gentle flavour in selected culinary preparations.
Its traditional history has also led to its use in infused oils, creams and other topical herbal products.
Modern phytochemistry has identified a diverse mixture of pigments, flavonoids, triterpenoids and other compounds in the flowers. Researchers have investigated these constituents in laboratory experiments and clinical studies, particularly in relation to topical applications.
However, the evidence is not sufficiently consistent to justify every claim made for the plant.
The distinction between traditional use and established clinical effectiveness remains important, particularly when calendula products are marketed for wounds, skin inflammation or other medical conditions.
Understanding calendula means appreciating both sides of the story: its genuine botanical and cultural significance, and the need to assess specific preparations according to the evidence available.
The golden flower is a good reminder that a plant's long history can be valuable without making every modern claim about it automatically true.
In summary
Calendula is Calendula officinalis. It is a flowering plant in the daisy family, native to the western Mediterranean region and widely cultivated elsewhere.
It is not the same as every marigold. Pot marigold belongs to Calendula, while familiar French and African marigolds belong to Tagetes.
Its flowers have several uses. They are valued as ornamental blooms, used in selected culinary preparations and included in traditional herbal products.
Its colour comes largely from carotenoids. The flowers also contain flavonoids, triterpenoids, saponins, polysaccharides and volatile compounds.
Its traditional use is particularly associated with topical preparations. Certain calendula flower medicines are recognised by the EMA for traditional use in minor skin inflammation, minor wounds and minor mouth or throat inflammation.
Clinical evidence remains limited. The EMA concluded that the studies it reviewed did not provide sufficient evidence to establish effectiveness conclusively.
Different preparations are not interchangeable. Dried flowers, infusions, infused oils, creams and concentrated extracts differ in composition and intended use.
Safety matters. Allergies to Asteraceae plants, skin sensitisation, age restrictions and the quality of material intended for food use should all be considered.
Calendula is an excellent example of why thoughtful herbal knowledge combines botanical identification, cultural history, practical preparation and evidence-informed interpretation. Its long-standing place in gardens and herbal traditions is clear, while the effectiveness of individual preparations must still be considered on the evidence available.
Sources and further reading
- Royal Botanic Gardens, Kew — Calendula officinalis
- Kew Science — Calendula genus and botanical characteristics
- European Medicines Agency — Calendula flower: traditional use and safety
- European Medicines Agency — Calendula flower public summary
- A review on phytochemistry and ethnopharmacological aspects of genus Calendula
- A Review on Traditional Uses, Phytochemistry and Pharmacological Activities of Calendula officinalis
- Calendula officinalis: A comprehensive review
Nurture With Nature note: This guide provides educational information about calendula's botanical identity, history, culinary uses, chemistry and scientific research. Discussion of traditional applications or experimental findings is not a claim that calendula or any product containing it treats, prevents or cures a medical condition.