Pot marigold (salve and wound wash)

What is Pot marigold (salve and wound wash)?

Pot marigold is a garden flower whose petals are made into skin salves and washes. The plant is Calendula officinalis. The bright orange and yellow petals are soaked in oil, fat or alcohol.

The soaked petals then go into ointments, creams and rinses. In the Nordic countries the plant is known as tarhakehäkukka (Finnish), ringblomma (Swedish) and morgenfrue (Norwegian).

Home use was for grazes, chapped hands, cracked lips and sore skin. It was also used as a rinse for small wounds.

Here is the honest verdict on the evidence. Human trials are few, small and mixed. There are some signs of help for skin damaged by radiation and for slow leg ulcers.

Long traditional use is not proof that it works. It is not proof that it is safe either.

This page covers skin use only. Swallowing strong calendula extracts is a different matter, and it is much less studied.

How does Pot marigold (salve and wound wash) work?

Nobody has shown clearly how pot marigold acts on human skin. Most of what is claimed comes from the laboratory, not from people.

In test tubes and in animals, calendula extracts appear to do several things:

- They seem to calm inflammation (heat, redness and swelling). - They appear to help skin cells move and multiply, which is part of healing.

- They slow the growth of some bacteria and fungi in laboratory dishes. - They mop up reactive molecules in test-tube tests.

Whether any of this happens on your skin is not established. A lab dish is not a wound.

The fatty base of a salve may matter too. Ointments hold water in the skin and soften dry patches. Part of the comfort people feel may come from the grease, not the flower.

A wound wash also rinses away dirt and loose crust. Plain clean water does that as well. No trial has shown that calendula adds much to simple washing.

What forms does Pot marigold (salve and wound wash) come in?

Pot marigold is sold mainly as a skin product. The common forms are simple.

- Salve or ointment, usually a petal extract in a fat or wax base. - Infused oil, made by steeping dried petals in a plain vegetable oil. - Cream or lotion, lighter and easier to spread than a salve.

- Tincture, an alcohol extract that is diluted in water for a wash or compress. - Dried petals, steeped in hot water to make a wash or soak. - Gels and mouth rinses, sold in some pharmacies.

Labels often give the extract strength, such as 2 to 10 percent. Higher is not always better. Nordic pharmacy products may be registered as traditional herbal medicines.

There are also calendula teas and capsules for swallowing. Those are a separate use with much weaker evidence, and they are not covered here.

Where it comes from:

Pot marigold has a long record in Nordic home care. It grew in monastery gardens and later in ordinary cottage gardens across Sweden, Norway, Denmark and Finland.

From the Middle Ages onward, herbals listed it for wounds, sores and skin that would not heal. Farm households kept a jar of petals in fat or butter. It was spread on grazes, chapped hands and cracked heels.

In the 19th century it was also used on sore nipples during breastfeeding and on children's rashes. Field dressings with calendula were reported in European wars.

German and Nordic herbal pharmacy carried it into the 20th century. Modern Nordic pharmacies still stock calendula creams. These uses are recorded history, not a recommendation to treat yourself.

What does Pot marigold (salve and wound wash) help with?

• Minor cuts, grazes and scrapes: This is the classic Nordic use, and it is the least tested. We found no good human trials of calendula salve on everyday cuts and grazes. Laboratory work suggests it may calm inflammation, but that is not proof on skin. Cleaning the wound and keeping it covered is what matters most. Treat calendula as a comfort measure, not as treatment.
• Dry, chapped or cracked skin: Many people find a calendula salve soothing on rough hands and lips. Much of that likely comes from the greasy base, which holds water in the skin. Good trials separating the flower from the base are lacking. It is a low-risk thing to try if you are not allergic to daisy-family plants.
• Skin reactions from radiotherapy: This is the best-studied use. One French trial in women having breast radiotherapy found fewer severe skin reactions with calendula ointment than with trolamine cream. Later trials did not all agree. Some found it no better than standard creams. Never apply anything to skin during radiotherapy without asking your cancer team first.
• Slow-healing venous leg ulcers: A small study reported faster healing when a calendula ointment was added to usual ulcer care. It was small and not blinded, so it is weak evidence. Leg ulcers need proper assessment, dressings and often compression. Calendula is not a replacement for that care.
• Nappy rash and mild skin irritation: Calendula creams are widely sold for babies in Nordic pharmacies. Evidence is thin and mostly from small or poorly controlled studies. A barrier ointment may help simply by keeping wetness off the skin. Stop if the rash gets redder or spreads.
• Sore nipples from breastfeeding: Traditional use for this is old and common. Studies are few and small, and results are mixed. Positioning and latch problems are the usual cause and need a midwife or lactation adviser. If you use a salve, check with your midwife that it is safe for the baby to swallow.
• Mouth and throat rinse for mild soreness: Diluted calendula rinses have been used for sore gums and mouth ulcers. Human evidence is limited and of low quality. Do not swallow the rinse, and do not use it to treat a dental infection. Tooth pain with swelling needs a dentist.

Which foods are rich in Pot marigold (salve and wound wash)?

Calendula petals are edible and were once used to colour butter, cheese and soup. That is a food use, not a medicine. The amount in food is far below anything used on skin, and it is not a way to treat a wound.

What are the side effects of Pot marigold (salve and wound wash)?

• Itching or redness where it is applied
• Contact allergy rash, sometimes days after first use
• Stinging or burning on broken skin
• Small blisters or weeping in strong allergic reactions
• Worsening of eczema in some people
• Rare swelling of lips or face after mouth rinses
• Very rarely, a whole-body allergic reaction

Good to know:

Most people tolerate calendula on the skin well. Serious reactions are rare.

The main problem is contact allergy. Pot marigold belongs to the daisy family, along with chamomile, arnica, yarrow and ragweed. People allergic to those plants react to calendula more often.

An allergy can appear after weeks of happy use, not only on day one. If new redness, itching or bumps show up where you put the salve, stop and wash it off.

Get urgent help for swelling of the face, lips or tongue, or trouble breathing. That is rare, but it is an emergency.

How much Pot marigold (salve and wound wash) should you take?

• Recommended daily: This page does not tell you how much to use. It describes what labels commonly carry. Shop salves and creams usually hold a 2 to 10 percent petal extract. Labels often say to spread a thin layer on the affected skin, once to a few times a day. Wash and rinse products are made by diluting a tincture or steeping dried petals in hot water, then cooling it. Strength varies a lot between brands. Follow the label on the product you actually hold. If you are treating a wound, a pharmacist or nurse is the right person to ask.
• Best time of day: Time of day does not matter much for a skin salve. Choose times you will remember. Many people use it after washing, when the skin is clean and still slightly damp. A thicker layer at bedtime suits dry hands and heels, under cotton gloves or socks.
• With or without food: Food is not relevant to a salve or a wound wash. These go on the skin, not in your mouth. For a mouth rinse, people usually rinse after eating and then spit it out. Do not swallow it.
• Time to effect: Be honest with yourself about what you expect. For dry or chapped skin, a salve often feels better within minutes, mostly from the grease. For irritated skin, any real change would take days. For a leg ulcer, weeks. It may also do nothing at all. The evidence does not promise an outcome, and no herb cures a wound on its own.
• How long to take it: Short-term use is the norm for skin products. Labels often suggest stopping after a week or two if nothing improves. A minor graze should be closing within a few days. A leg ulcer or a rash that drags on for weeks needs a proper look, not a longer course of salve. Repeated daily use over months raises the chance of a contact allergy. That is the main reason not to keep going without a reason.