If you are growing calendula on your small farm or in a large home garden, you're probably planning to sell it either dried or transformed into a calendula product. Dried calendula is used to make products like salves, oils, and teas. Or, perhaps you just want to make a calendula-plantain-chickweed salve for skin conditions or put flower petals in your goat's milk soap. Whatever your value-added product, you will want to harvest and dry the calendula first. Here's how to do it.
When to Harvest Calendula
The best time to harvest calendula flowers is in the morning after the dew has dried. They are fresh, opening to the sun, but don't have wet petals. You should also harvest the blossoms when they are half-open. Soon after this point they open more and are past their prime medicinally, and the petals begin to wither.
How to Use Calendula
Once dried, you may use calendula blossoms to make oil, which can then be used to make a salve. Or the flowers can be added to sugar to create a simple sugar scrub. Infuse the dried flowers in water to create a facial toner or add to aloe vera gel for sunburn relief.
Equipment / Tools
- Electric dehydrator (optional)
- Cloth, screen, or mesh (for drying)
- Glass jars or sealable plastic bags
Snip Off the Flower Heads
Snipping off the flower head at the top of the stalk is the standard way to harvest calendula. Use scissors or your fingers to pinch the stem. You may want to trim back the stem that remains on the plant so that the stem does not begin to rot.
You could also pull entire plants and include the leaves, which have much of the same medicinal quality as the flowers, but it's so much easier to continually harvest flower blooms from a patch of calendula throughout the season.
With calendula, the more often you harvest, the better. If you allow blossoms to stay on the plants, they will go to seed. When you deadhead frequently, the blooms will return and multiply. So snip early and snip often!
Dry the Calendula
Don't wash the flower heads. Spread them onto a ventilated surface: cloth, screen, a mesh of some type. You can build drying screens from light lumber and screen―make a frame and staple screen to it. You can even build a cabinet to hold the screens and put a fan in it to circulate air. Drying by this method is can take as much as a week depending on atmospheric conditions; make sure the flowers are fully dry to the touch .
You can also use an electric dehydrator indoors to dry the calendula. Use a temperature of 90 to 95 degrees Fahrenheit. You don't want to expose the delicate flowers to too much direct heat. It usually takes about 24 hours to fully dry the flowers in an electric dehydrator at this temperature.
Before storing calendula, make sure it is completely dry. The green flower heads are dense and take much longer to dry than the petals. The petals will feel wispy and fragile when they are completely dry, and they will pull out of the heads extremely easily.
Store Them Properly
You can store calendula flowers whole with the green flower head, or pull the petals out and compost the heads. For tea or tincture purposes, you may wish to provide just petals to your customers. If you're making oil, you may find it easier to use the whole head, avoiding the labor of plucking the petals.
Store dried calendula in glass jars with airtight seals or sealed plastic bags or under vacuum seal. Keep it out of the light.