GrowZone

Seed starting

When to start seeds indoors by ZIP code and zone

Most seeds go indoors 4 to 8 weeks before your last frost. In zone 8a with a last frost around Mar 29, tomatoes start indoors around Feb 15 and peppers around Feb 1.

Choose a crop and ZIP to get the computed seed-starting week.

New York, NY · Zone 7b Tomatoes Apr 15 Open seed-start calendar · last frost Apr 8 Atlanta, GA · Zone 8a Tomatoes Apr 5 Open seed-start calendar · last frost Mar 29 Minneapolis, MN · Zone 5a Tomatoes May 17 Open seed-start calendar · last frost May 10 Chicago, IL · Zone 6a Tomatoes May 2 Open seed-start calendar · last frost Apr 25 Dallas, TX · Zone 8b Tomatoes Mar 19 Open seed-start calendar · last frost Mar 12 Denver, CO · Zone 6a Tomatoes May 12 Open seed-start calendar · last frost May 5 Phoenix, AZ · Zone 10a Tomatoes Feb 12 Open seed-start calendar · last frost Feb 5 Seattle, WA · Zone 9a Tomatoes Mar 27 Open seed-start calendar · last frost Mar 20