How to Grow Echinacea From Seed

Echinacea is a perennial that appreciates a cold spell before it sprouts. The easiest route is to sow the seeds outdoors in late fall so winter naturally stratifies them, or start them indoors 8 to 10 weeks before your last frost after a few weeks of cold, moist stratification in the fridge. You can also direct-sow in spring once the soil warms. However you start, plants usually spend the first year building roots and leaves, then bloom generously from the second year on.

For the best germination, give the seeds a cold, moist chill first: mix them with damp sand or vermiculite in a bag and refrigerate for a couple of weeks (Echinacea purpurea needs less than most). Then sow about an eighth to a quarter inch deep in well-drained soil or pots, keep evenly moist at 68 to 72F, and expect seedlings in 10 to 20 days. Give plants full sun and space them 18 to 24 inches apart so air moves freely around the mature clumps.

Coneflowers are tough and low-maintenance once they take hold. Water new plants regularly through their first season, then ease off, since established echinacea is quite drought-tolerant and dislikes soggy soil. Skip heavy feeding, which makes them floppy. Deadhead through summer for more blooms, then leave the last flower heads standing into fall and winter to feed finches and other birds. Divide crowded clumps every three or four years in spring. Echinacea is a hardy perennial across USDA zones 3 to 9, so in cold-winter states like Minnesota, Michigan, or upstate New York it dies back to the ground in fall and returns on its own each spring. In those regions a cold, moist chill is exactly what the seeds want, so fall sowing outdoors, or a few weeks in the refrigerator before spring planting, gives you the best germination.

Echinacea is a star of the pollinator garden, and it pairs beautifully with other sun-loving, bee-friendly plants. These four make especially good companions, and you can add any of them in one click:

If you are growing echinacea for cut flowers, snip stems in the morning just as the blooms open, when the petals are freshly unfurled, and they will last well in a vase. To save seed instead, leave some flowers to fade and dry on the plant until the spiky central cones turn dark and brittle, then cut the cones, break them apart wearing gloves, and collect the small seeds. Leaving a few cones standing also feeds the birds through winter.

Echinacea is grown first as an ornamental and a food source for wildlife. The big rosy daisies bring in bees and butterflies through summer, and if you leave the spent flower heads standing, goldfinches pick the seeds all winter. The tall, stiff stems hold up well as cut flowers, lasting a week or more in a vase. Some gardeners also steep the petals and dried flower heads into a mild garden-to-cup tea.

• Poor or patchy germination: echinacea needs a cold, moist chill. Stratify the seeds in the fridge or fall-sow outdoors, and be patient, as they can take up to three weeks.
• No flowers the first year: normal. Seed-grown plants bloom from year two once their roots are established.
• Powdery mildew or crown rot: usually from crowding or wet soil. Space plants well, water at the base, and grow in well-drained ground.
• Aster yellows: a disease that greenifies and distorts blooms. There is no cure, so remove and destroy affected plants and control leafhoppers that spread it.