Cumin

Cumin needs a long, frost-free season of roughly 120 days from sowing to harvest, and seed germinates best when soil sits between 36–41°F, with optimum emergence at 68–86°F; soaking seed for eight hours before sowing aids germination. Growers either start seed indoors six to eight weeks before the last frost or sow directly outdoors one to two weeks after it, planting small groups of four seeds a quarter inch deep every four to eight inches and thinning seedlings to one plant per four to eight inches once they reach two inches tall; because the plant does not transplant well, indoor starts are usually kept in biodegradable pots that are buried whole rather than disturbing the roots. Some growers instead sow directly once night temperatures stay above 50°F, spacing seed closely in the row so the plants can lean on one another, since lodging after flowering or heavy rain does not harm seed development, later thinning to four to six inches apart.

Grow cumin in full sun in fertile, well-drained soil—clay, loam, or sand, at an acid to neutral pH—and allow three to four warm months for a good seed set. Water regularly, letting the soil go almost dry between waterings and then soaking it thoroughly.

Aphids, fusarium wilt, alternaria blight and powdery mildew have been reported as problems on cumin, though the plant has also been described as generally free of pests and diseases and notably resistant to drought. Its umbels attract beneficial insects such as ladybugs, lacewings and predatory wasps, which prey on harmful insects on the plant and on neighboring plants.

Cumin is harvested once its flower clusters have dried and turned brown, or once the seeds are plump and have turned dark tan and the foliage has died back; growers cut the stems close to the ground or pull entire plants to hang and finish drying. Because each fruit holds only a single seed and each plant sets only a few fruit, a large planting is needed to gather a useful quantity.

Once fully dry, the clusters are placed in a paper bag and thrashed, or the seed pods rubbed together, to release the seed, which shakes free easily once dried; a mortar and pestle is then used to grind the seed into powder.

Cumin is grown mainly for its dried seed-like fruit, used whole or ground as a spice in stews, bean dishes, sausages, pickles, cheese and curries, and for pickling and flavoring liqueurs, across Indian, Middle Eastern, Mexican and Mediterranean cooking; the essential oil pressed from the seed is also used as a flavoring.

The seed's essential oil is additionally used in fragrances and cosmetics and has served as an antibacterial agent; in ancient Egypt the seed was used as a preservative in mummification.

Across numerous traditional healing systems, including Ayurveda and folk medicine in Iran, Morocco, Tunisia, Italy, Poland, Russia, Britain, the United States, the Malay Peninsula and Indonesia, cumin seed has historically been used as a carminative, stimulant, sedative and antispasmodic for complaints such as flatulence, dyspepsia and colic, while the Apalachee people of the Florida Panhandle used plant water for medicinal purposes. No modern scientific evidence supports these traditional attributions as effective or safe therapeutic treatments.

Cumin originates in the Mediterranean and Irano-Turanian region, with archaeological seed finds in Syria dated to the second millennium BC and mentions in Old and New Testament biblical texts, making it one of the earliest herbs cultivated across Asia, Africa and Europe. It was carried to the Americas by Spanish and Portuguese colonists and is now grown commercially across the Indian subcontinent, North Africa, Mexico and Chile, having also been found growing wild as far north as Massachusetts.