Organic Cilantro Seeds. Heirloom Herb. Cilantro is also known as coriander. The seeds are used ground-up as a seasoning in all sorts of foods and candies. Fresh leaves are indispensable to Latin American and Chinese cuisine. While cilantro has good heat resistance and is slow to bolt, plants will none the less eventually bolt in the high heat of summer. To counter this, sow seed every two weeks to ensure a continuous supply all summer long. Grows to 70 cm (28″). Annual.