(Image from: https://hudsonvalleyseed.com/products/champion-collards?_pos=1&_sid=0fffffd72&_ss=r)

Growing Instructions for Cilantro/Coriander:

Direct sow in succession every 2 weeks from about a month before last frost until early fall. Succession sowing is all important with cilantro; it bolts after only a couple weeks of harvest. It is not picky about soil. Leaves grow low to the ground and purple-hued in cold weather, yet remain tasty. Harvest confidently–even greedily–lest plants bolt before you get your share.

(from Hudson Valley Seed Company website)