Herbal Monograph: Calendula

Posted by Emily Rubeo on January 12, 2026

Another herbal monograph so you can understand more about the wonderful botanicals in our products and why they are there.

Calendula

An herb I grow every year from seed and from volunteer from the year's prior. It is an incredibly versatile herb and one many people are familiar with. It's a staple for many herbalist's and homes.

Calendula, as small as an elbow,
with orange flowers, heals
from June to October,
withers,
thinks about someone else’s illness,
forgets about itself. -Jan Twardowski

Botanical Name:

Calendula officinalis

Common Names:

Pot marigold, garden marigold (distinct from Tagetes marigolds)

Parts used:

Flowers (fresh or dried, fully opened blossoms, entire flowering head). It is important to use the entire flower and not just the petals. The underside of the flower base contains much of the aromatic and resinous properties of the plant which are responsible for it’s medicinal actions. The petals themselves are relatively mild and sweet, but the entire flower is distinctly much more medicinal.
Some practitioners also use the leaves, which are said to contain a degree of iodine.

Energetics:

Temperature: Warming. Calendula is beneficial in that it a gentle warming agent of the 1st degree according to the Greek humoral system. This means that it gently warms the solar plexus, thins fluids, and dispels moisture through the pores of the skin and other channels of the body. From the perspective of the Physiomedicalists, it would be considered a stimulant, meaning that it directly activates and directs the vital force in a particular direction. All of these temperature qualities point to it’s usefulness in the treatment of damp and cold type tissue states
Moisture: Mixed. The effects upon moisture are varying depending upon the situation and organ systems being analyzed. On the one hand Calendula has a moistening property, and on the other it has drying properties. Because it is bitter, we see it has a net draining effect upon fluid metabolism and thus has a constitutional drying effect. Yet it has a soothing effect upon the mucosal membranes, particularly those lining the gastrointestinal tract, and can be used for dryness and irritation of those tissues- a critical action in chronic inflammation of the gut associated with food intolerance and antibiotic trauma. Anyone that has prepared Calendula into a tincture or an oil from the fresh plant knows that it has a lot of moisture content to it. Biochemically, it contains a degree of mucilage in the form of polysaccharides, which are responsible for it’s tonic effects on the immune system, as well as it’s soothing and moistening effects on the mucosal membranes.

Taste:

The taste of Calendula is rather complex.
First and foremost it is a bitter remedy, which indicates many of it’s primary actions and organ affinities.
Next, it has a slightly sweet and salty taste, as well as a degree of pungency. These tell us that it has a slightly nutritive quality (sweet) which it has upon the mucosal membranes, a water regulatory aspect (salty), as well as a stimulating property (pungent).
Through understanding these tastes we can determine and understand much more of the complex properties of this valuable remedy.

Key constituents:

Carotenoids (antioxidants), flavonoids (anti-inflammatory compounds), triterpenoid saponins, resins, polysaccharides, volatile oils, sterols and bitter compounds.

Plant properties and primary Actions

Vulnerary (tissue healing), alterative, anti-inflammatory and antiseptic, astringent, antimicrobial (antibacterial/antifungal), demulcent (soothing), lymphatic support (lymphagogue), bitter tonic/cholagogue (liver support), emmenagogue and immune support

Plant Indications

Calendula has traditionally been used for:

Burns, cuts, scrapes and wounds
Inflammation and dermatitis
Sore throat and mucositis
Enlarged lymph glands
Infections (bacterial, fungal)
Skin irritations (eczema, diaper rash, bug bites)
Indigestion and spasmodic discomfort
Varicosities and hemorrhoidal irritation

Organ Systems & Tissues

The primary organs, systems, and tissues that mullein has an affinity for.

Skin & Mucous Membranes

Calendula is best known for its affinity for epithelial tissues. It promotes wound healing, soothes irritation, and supports tissue regeneration, making it a cornerstone for first-aid salves, washes, and compresses. Calendula helps modulate any local inflammation, and prevents bacterial overgrowth and infection. The astringency helps to draw the wound together to heal it more rapidly and preventing excessive scar formation. It is quite specific in it’s treatment of damp/heat type wounds, where there is swelling, pus, redness and inflammation.

Lymphatic & Immune Support

Its antimicrobial and lymphatic actions support detoxification pathways and help clear stagnant lymph, particularly around inflamed glands and soft tissues. This is one of our best gentle lymphatic remedies which is used for swollen and painful lymph nodes. Calendula has a mildly tonic action upon the immune system. This is slightly different from the directly immunostimulant properties of Echinacea or the deeper acting tonic properties of something like Reishi mushroom. Rather, Calendula acts as a gentle remedy which builds up the vital heat of the body, maintains balance in the fluid metabolism by clearing any stagnation, keeps the channels of elimination open and detoxifying, and helps keep any pathogenic bacteria at bay. You'll oten read that Calendula it is “anti-bacterial” and “anti-fungal,” though rather than acting as a direct antimicrobial agent, it is best considered a “bacteriostatic.” This means that it contains the bacteria and prevents their spread and infiltration by keeping the lymph moving. Remember, the lymphatic system is a critical part of the immune system and through keeping the lymph moving and cleansing the blood the immune system is able to better screen the system and do it’s job more efficiently and effectively.

Gastrointestinal Tract

As a gentle bitter and demulcent, Calendula supports healthy digestion and mucosal tone. The inflammation-modulatuing action of Calendula is demonstrated through it’s topical effects in wounds, but also in it’s internal effects upon the GI. Whenever there is the presence of a food allergy or intolerance, the digestive system will be inflamed which will typically reflex to systemic inflammation elsewhere in the body. This can manifest as joint pain, autoimmunity, or chronic skin conditions like eczema and acne. While Calendula may not act like “herbal aspirin,” it is beneficial primarily in the treatment of inflammation in the GI, which then has a reflex action upon inflammation elsewhere in the body. Because of it’s major affinity for the lymphatic system, we see it also benefiting swollen lymph accompanied by inflammation due to the stagnation.

Liver and Gall Bladder Support

The bitter components can gently stimulate liver function, aiding digestion and metabolic clearing. All bitter tonics will have a stimulant effect upon the liver, increasing it’s detoxification capacities and often increasing production of bile and it’s secretion by the gallbladder. This is beneficial for the metabolism and digestion of fats and oils, as well as general digestive insufficiency. Bitters have a downward baring mechanism, meaning that they bring the vital force down and out. This typically results in fluids being drained from the body, which ultimately leads to a constitutional net drying effect. This is critical to understand about bitters! Thus we see Calendula drains fluids not only through it’s action upon the lymphatics, but also through a constitutional bitter action on the liver, gallbladder, and entire gastrointestinal tract

Female reproductive system

In North America this is not one of the primary uses of Calendula, though throughout Europe we see that it is one of the major standby remedies used to bring on a stuck and stagnant menses, as well as to relieve painful menstruation. We can see this linked to the bitter taste/action, which again has a downward baring mechanism of action and drains fluids from the body. As we will see under the energetics, because Calendula is primarily warming, we want to use it when the uterus and blood are cold and stagnant and require stimulation to get things moving again.

Plant preparations

Infusion or Decoction: Deep brews in water for skin compresses or internal use. It’s important to remember to cover it with a lid, as the volatile oils and resins will evaporate off with the water and you will loose a portion of the medicine in the steam.
Tincture: 1:5 at 70% alcohol from freshly dried material. Due to the presence of triterpenes, as well as the volatile oils and resins, Calendula best yields to a high percentage alcohol extraction. I use around 70% alcohol and strongly recommend using the freshly dried plant material. Fresh calendula flowers contain a lot of water and will dilute and even risk the stability of the tincture.
Oil Infusion: This is the most common way that you'll find calendula flowers used.
Again, this is because the resins, volatile oils and triterpenes are insoluble in water, and thus soluble in high alcohol and oils. The freshly dried flowers infuse nicely to all manner of carrier oils. This oil can be used directly on the skin, or prepared into a salve with beeswax, other infused oils, and/or essential oils.
Topical Poultice/Wash: Also known as a succus, this is essentially a pressed juice of the fresh plant material, which can either be immediately applied (usually topically) or preserved in alcohol. If you do not preserve it in alcohol it will go bad within a few days, so be sure to use it up quick or preserve it somehow!
Sitz Bath: Postpartum and perineal healing.
Note: Traditional monographs and regulatory sources also acknowledge its use topically for minor skin inflammation and wound healing.

Safety & Considerations

Calendula is generally regarded as a relatively mild and safe plant for
internal consumption. Though due to it’s emmenagogue effects, it is suggested to be avoided for internal use during pregnancy. Topical use during pregnancy on the other hand is acceptable.
There are no documented herb-drug interactions with Calendula.
Use caution if allergic to plants in the Asteraceae family (daisies, ragweed, marigold).

Clinical Patterns & Practical Use

Wound Healing & First Aid

Calendula’s vulnerary and antimicrobial effects make it a first-aid staple for cuts, scrapes, sunburn, and irritations. Its antioxidants support tissue repair and soothe inflammation. I mentioned this briefly earlier on, but this is Calendula’s primary claim to fame. No other remedy truly surpasses Calendula in it’s ability to effectively keep wounds clean, facilitate healing, and prevent infection. From the run of the day cuts and scrapes and road-rashes, to more intense wounds like lacerations, puncture wounds and traumas, Calendula is your go to topical first aid remedy. It’s major benefit is that it is not just healing the wound, nor is it “killing the bacteria,” but it is operating on the level beneath the skin and the wound itself, maintaining a healthy flow of lymphatic fluids and thus keeping a consistent supply of immunological components and preventing any infection from spreading.

It is useful here to differentiate it from a few other common topical remedies that are typically used. Comfrey (Symphytum officinale) is a great vulnerary agent as well, and combines quite nicely with Calendula in this regard, just be sure to exercise caution with Comfrey as it sometimes heals a wound a bit too quickly and can seal in a deep wound and lead to infection (hence it combines well with Calendula which works on that deeper level). I use this combination in our first aid ointment!

As far as inflammatory skin conditions, Calendula is excellent for dermatitis, itch, diaper rash, insect bites, and chronic irritation due to its inflammation modulating and soothing profile.

Lymphatic Support & Immune Balance

As a lymphatic stimulant and antimicrobial, calendula helps reduce glandular swelling and support healthy immune responses. This is probably the main way that Calendula is used internally in modern herbalism and it works like a charm! As mentioned previously, this remedy is excellent for dispersing stagnant and congested fluids within the lymphatic system- as commonly seen by swollen nodes. Picture here someone who is run down, weak, tired, melancholic-depressed, and just can’t get over that cough or cold from a few weeks ago. As Matthew Wood notes, it is specific for “lingering unresolved infections.” This could be a respiratory infection, a fever, or simply the common cold.

I'll also mention the diaphoretic property of Calendula. It does have an influence upon the febrile mechanism (fever) by warming up the system and pushing fluids to the surface. In this regard it is considered a stimulant diaphoretic (as compared to a relaxant diaphoretic) and can be used in the treatment of fever.

You'll see here that Calendula has applications in acute situations of the immune system, such as coughs, colds and flus, but specifically when it is accompanied by fever and swollen lymph nodes and on the other hand, it is also of great benefit after the primary symptoms have subsided and the person just isn’t “quite all the way right,” feels tired, sluggish, and has a bit of lingering infection or low-grade fever.

Digestive patterns including food Intolerance, leaky gut syndrome and antibiotic trauma

This is a major subject these days.

Calendula is a key remedy for digestive patterns involving food intolerance, post-antibiotic imbalance, and increased intestinal permeability. These patterns are increasingly common and often arise after disruption of the gut microbiome, particularly following antibiotic use.

Antibiotics indiscriminately reduce both pathogenic and beneficial bacteria in the gastrointestinal tract. This microbial disruption weakens digestion, lowers immune resilience, and increases sensitivity within the gut lining. As the intestinal barrier becomes compromised, the immune system may begin reacting excessively to dietary proteins and other substances, leading to localized and systemic inflammation. This pattern is commonly referred to as increased intestinal permeability, or “leaky gut.”

As inflammation persists, the gut-associated lymphatic tissue (GALT) can become congested and overworked, contributing to bloating, digestive discomfort, and immune dysregulation. Over time, inflammatory byproducts and metabolic waste burden the liver, blood, and lymphatic systems, creating a broader pattern of stagnation, heat, and irritation throughout the body.

Calendula is particularly well suited to this picture. As an astringent and vulnerary, it supports the repair and integrity of the intestinal lining, helping to restore barrier function much like it does with external wounds. Its demulcent polysaccharides soothe irritated mucosal tissues, while its inflammation-modulating actions help calm immune hyper-reactivity.

As a lymphatic stimulant, calendula supports drainage of congested lymphatic tissue in the gut, easing bloating and supporting immune balance. Its mild bitter action gently stimulates digestion and liver function, helping to move metabolic waste and support portal circulation without excessive stimulation.

Calendula also acts as a systemic alterative, thinning and mobilizing stagnant fluids while supporting elimination through the liver, lymph, skin, and digestive tract. In doing so, it helps prevent secondary microbial imbalance and supports overall tissue resilience.

This same combination of vulnerary, anti-inflammatory, antimicrobial, and lymphatic actions makes calendula useful in gastric and duodenal ulcers, where irritated, inflamed mucosal tissue requires both protection and repair. When used thoughtfully and in appropriate doses, calendula helps soothe pain, reduce inflammation, support healing, and protect vulnerable tissues. Its mucilage further contributes to calming and coating irritated mucous membranes, both internally and externally.

Female reproductive actions

As mentioned earlier, Calendula is widely used throughout European traditions as a reliable emmenagogue, used to help stimulate a stagnant menses (amenorrhea) and to relieve any associated pain (dysmenorrhea). Remember, Calendula is a warming agent, and thus we want to only use it in cases where the uterus is constitutionally cold, with a lack of circulation and overall congestion of fluids.

Calendula also has applications as a mucosal membrane tonic and soothing agent when the vaginal wall is overly dry and irritated. This is especially applicable post childbirth if the vaginal wall tears at all.

As a remedy with shown anti fungal actions, Calendula becomes an important remedy in
the treatment of systemic candidiasis, which commonly goes along with Leaky Gut
Syndrome. So we can see that Calendula’s net global action set addresses this concern on many levels- lymphatic, gut, immune, and now even the female reproductive system.

Growing & Ecology

Calendula is an annual plant that thrives in many climates and readily self-sows once established.

It prefers:

Full sun to partial shade
Moderately rich, well-drained soil

Calendula blooms generously throughout the growing season and is often harvested repeatedly to encourage continued flowering. Its bright orange and yellow petals are rich in resins and pigments, which contribute to both medicinal potency and infused oil color.