- Calendula is a versatile flower available in shades of yellow, orange and white. At maturity, calendula measures 12 to 24 inches with a similar spread. The plant grows in full sun or partial shade and does best when the soil in slightly moist soil. Calendula flowers are effective in a cut flower bouquet or can be hung upside down to dry in a warm, well-ventilated spot. The fragrant petals are often used to flavor salads and soups.
- Check for readiness after the flowers wilt. When the calendula blossoms have wilted and dropped off the plant, a seedhead is visible at the top of the stem. The seedhead contains a clump of bumpy seeds that are easily recognized by the "c" shape. Calendula seeds are bright green, but eventually ripen to a dull brownish color. At this point, the seeds are harvest ready.
- Hold the seedhead over a paper sack. Snip the stem under the seedhead and let it drop into the sack. At this point, it's easiest to let the seedheads dry completely before removing the seeds. Leave the seedheads in the paper sack, and then place the sack in a warm, well-ventilated room out of bright sunlight. Alternatively, place the seedheads on a paper plate or a try lined with newspaper. Shake or stir the seed heads every few days so the seeds dry evenly.
- When the seedheads are completely dry, remove the seeds. Hold the seed head over a bowl, rub the dry seedheads between your palms and let the seeds fall into the bowl. Pour the seeds onto a mesh screen and sift out the plant debris. Alternatively, use a pair of tweezers to pick the calendula seeds from the debris.
- Place the dry calendula seeds in a small paper sack or envelope. Label the envelope with pertinent information, including seed type of seeds and harvest date. Put the sack or envelope in a glass jar with a secure lid. Store the jar in a cool, dark closet or cupboard. Never store calendula seeds in plastic, as the seeds can't breathe and may develop mold.
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