Zone crop calendar

When to plant tomatoes in Zone 6a

These supported ZIPs share the same zone label but still use ZIP-specific frost dates.

Milwaukee, WI · Zone 6a Tomatoes May 17 Open answer · last frost May 10 Chicago, IL · Zone 6a Tomatoes May 2 Open answer · last frost Apr 25 Omaha, NE · Zone 6a Tomatoes May 12 Open answer · last frost May 5 Aurora, CO · Zone 6a Tomatoes May 12 Open answer · last frost May 5 Denver, CO · Zone 6a Tomatoes May 12 Open answer · last frost May 5 Colorado Springs, CO · Zone 6a Tomatoes May 22 Open answer · last frost May 15