Coneflowers can be started from seed in spring indoors (about a month before the last spring frost date) or outdoors (when the soil temperature has reached at least 65°F/18°C). Note: Coneflowers started from seed may take 2 to 3 years before producing blooms.

Echinacea is easy to grow from seed, as well, but requires a cold, moist period—called stratification—in order to germinate. Sow seeds thickly in the fall (after hard-frost in the north and before winter rains elsewhere), covering lightly to discourage birds from eating them.

Echinacea is easy to grow from nursery stock, seed or division. ... Seeds will germinate in 10-20 days. Flowers reliably bloom the first year from seed if sown early (see Summer Flowers for Color).

The central root mass of a coneflower will grow in size each year, eventually growing up to 2' diameter. Once the coneflower root mass approaches this size it should be divided to keep the plant attractive and vigorous.

With the right technique, coneflowers are easy to grow from seed. ... The first is to mix the seeds with some damp sand, put it into a plastic zipper-top bag, and then place the bag into the refrigerator for 8 to 10 weeks. Come spring, plant the seeds either directly into the garden or indoors under grow lights.. . . . .364011234503!]0000000000000009783314146703!]