Direct sow 1/16-1/8” deep after danger of frost, or sow indoors for transplant 6 weeks before last frost. Thin/ transplant to 12-18”. Plants prefer full sun. Deadheading prolongs bloom and limits self-seeding.
Seed Saving
Collect seeds from seed heads that are fully dry. Shell by hand or shake plants with dry seed heads into a bucket, winnow or screen to clean. Some cross-pollination may occur, isolate from varieties of the same species by 1/4 mile.
Question
warren neth –
What’s the seeding rate/timing you’d advise?
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Shop Manager Andrew Still –
We direct sow after average last frost or sow for transplant in April. 12-18 in. between plants is optimal but they will tolerate much closer. Annual coreopsis is a very forgiving and easy to grow plant. USDA NRCS says “Broadcast or shallowly drill 1-2 grams per 100 square feet (1-2 lb/acre).”
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