what time do you plant collards
Sowing Seed Indoors: 1  Direct sowing is recommended, but to get a head start you can grow collards indoors 3-4 weeks before the last frost. 2  Sow seeds Â¼ - Â½ inches deep in seed-starting formula. 3  Keep the soil moist at 70 degrees 4  F. Seedlings emerge in 10-21 days.