How to Make Calendula-Infused Oil

Calendula-infused oil is one of the most useful preparations you can make from dried calendula flowers. It serves as a stand-alone skin oil, and as the base for salves, balms, and lotions. The process is simple — dried flowers steeped in a carrier oil over time — but a few details make the difference between a richly infused oil and a watery, short-lived one.

This guide covers both the slow (cold) infusion method and the faster warm infusion, with notes on choosing a carrier oil, troubleshooting, and storage.

Why Use Dried Flowers, Not Fresh

Fresh calendula flowers contain significant moisture. When you steep fresh flowers in oil, that water is released into the oil, creating conditions favorable for microbial growth and rancidity. Properly dried flowers — crisp and no longer pliable — release their oil-soluble compounds into the carrier without introducing water. This is why dried calendula is strongly preferred for oil infusions, even though fresh flowers are vibrant and beautiful.

See How to Dry and Store Calendula Flowers for guidance on drying flowers yourself or evaluating commercially dried stock.

Choosing a Carrier Oil

The carrier oil you choose determines the texture, absorption, and shelf life of your finished infusion.

• Olive oil — Traditional and stable. Its natural antioxidants give it good shelf life (12–18 months). The texture is richer and heavier than some alternatives, which suits salves and balms but can feel greasy on the face.
• Sweet almond oil — Lighter texture, absorbs more quickly. Shorter shelf life than olive oil (roughly 9–12 months). A popular choice for facial preparations.
• Jojoba oil — Technically a liquid wax, not an oil. Extremely stable (shelf life of several years), non-comedogenic, and very similar in composition to human sebum. More expensive, but well suited to facial and long-shelf-life applications.
• Sunflower oil — Light, affordable, and widely used in commercial cosmetic manufacturing. Choose high-oleic sunflower oil for better stability.
• Fractionated coconut oil — Light, odorless, long shelf life. Stays liquid at room temperature (unlike regular coconut oil). A neutral base that lets the calendula character come through.

For a first infusion, olive oil or sweet almond oil are good choices — they are widely available, well-characterized, and work reliably with calendula.

Method 1: Cold (Slow) Infusion

This is the traditional method. It produces a high-quality infusion with minimal risk of degrading the flower's compounds through heat.

What you need:

• Dried calendula flowers (whole heads or loose petals)
• Carrier oil of your choice
• A clean, dry glass jar with a lid
• A fine mesh strainer or cheesecloth

Ratio: Fill the jar loosely with dried flowers (don't pack tightly), then pour oil over them until the flowers are fully submerged with about 1 inch of oil above. A reasonable starting ratio is 1 part flowers by volume to 2 parts oil.

Process:

1. Make sure the jar and lid are completely dry — any water introduction risks spoilage.
2. Add the dried flowers, then pour in the carrier oil to cover.
3. Seal the jar and label it with the date.
4. Place the jar in a warm, sunny windowsill for 4–6 weeks, turning or shaking it gently every day or two.
5. After 4–6 weeks, strain the oil through cheesecloth or a fine mesh strainer, pressing or squeezing the spent flowers to extract as much oil as possible.
6. Transfer the strained oil to a clean, dry, dark glass bottle and store in a cool, dark place.

The finished oil should be a deep golden to orange color, depending on the variety and amount of flowers used. A pale, nearly clear result usually indicates low-quality dried flowers or insufficient flower-to-oil ratio.

Method 2: Warm Infusion

The warm method produces results in hours rather than weeks. It is well suited to situations where you need the infused oil sooner, though some herbalists prefer the slow method on the principle that gentle extraction better preserves the flower's more volatile compounds.

Double boiler method:

1. Place flowers and oil in the top of a double boiler (or in a heatproof bowl set over a pot of simmering water).
2. Maintain a gentle, low heat — the oil should be warm but not simmering or smoking. Target 100–120°F (38–49°C) if you have a thermometer.
3. Hold at this temperature for 4–8 hours, checking periodically to ensure the oil isn't overheating.
4. Strain and store as described above.

Slow cooker method:

1. Combine flowers and oil in a slow cooker on the lowest setting.
2. If your slow cooker's lowest setting runs hot (above 150°F/65°C), prop the lid slightly to reduce temperature, or use a towel between the lid and pot.
3. Infuse for 4–8 hours.
4. Strain and store.

Extending Shelf Life

Adding 0.5–1% vitamin E oil (tocopherol) by volume to the finished, strained infusion helps slow oxidative rancidity and can extend shelf life by several months. This is a common practice in commercial skincare production and is easy to do at home — most health food stores carry vitamin E oil in dropper bottles.

Turning Infused Oil into a Salve

A calendula salve is made by melting beeswax into the infused oil:

• A soft, lip-balm-style texture: approximately 0.5 oz beeswax per 4 oz infused oil
• A firmer salve: approximately 1 oz beeswax per 4 oz infused oil

Melt the beeswax gently, stir in the infused oil, then pour into tins or small jars and allow to cool completely before sealing.

Quality of Starting Material

The finished oil is only as good as the flowers you start with. Vibrant, recently dried calendula with intact petals and rich orange or yellow color will produce a noticeably richer, deeper-colored infusion than pale, faded, or old dried flowers. See What to Look for When Buying Dried Calendula Flowers for sourcing guidance.

Frequently Asked Questions

How do I know if my infused oil has gone bad?

Trust your nose. Rancid oil has a distinctly unpleasant smell — crayon-like or metallic. Fresh infused oil should smell like the carrier oil with a faint, pleasant herbal note. If the oil smells off, discard it.

Can I infuse calendula in coconut oil?

Yes, but regular coconut oil is solid at room temperature, which makes for a naturally firm consistency without added beeswax. Use fractionated coconut oil if you want a liquid infusion. Standard coconut oil works well for solid salves and balms.

My oil turned out pale — what went wrong?

Most likely the dried flowers were old or low-quality, or the flower-to-oil ratio was too low. Good quality, recently dried calendula produces a deeply colored oil. Old, faded flowers yield little pigment or character.

How long should I steep for the best result?

For cold infusion, 4–6 weeks is the sweet spot. Steeping beyond 8 weeks doesn't typically improve the oil and increases the chance of mold developing if any moisture was present. For warm infusion, 6–8 hours at a gentle temperature is sufficient.

Related Articles

• What Is Calendula? An Introduction to the Plant and Its Uses
• Calendula in Skincare: Traditional Uses
• How to Dry and Store Calendula Flowers
• Is Calendula Safe? What You Should Know
• What to Look for When Buying Dried Calendula Flowers

Sources and References

• Grieve M. A Modern Herbal. 1931. Reprinted Dover Publications, 1971.
• European Medicines Agency. Community herbal monograph on Calendula officinalis L., flos. EMA/HMPC/679928/2013. 2009.
• Hoffmann D. Medical Herbalism: The Science and Practice of Herbal Medicine. Healing Arts Press, 2003.

The content on this page is for educational purposes only and is not intended as medical or nutritional advice. Consult a qualified healthcare provider with any questions about your health.