‘For most perennials, the best time to sow seeds is in early spring (February to April), when you can give them a head start ... grown from seed, including yarrow, coreopsis, echinacea ...

Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Cold stratification of echinacea seed Q: I bought some Missouri native wildflower seeds, but the packet instructions say to so ...