Plant Tomatoes in Zone 4a
Seed-starting, transplant & harvest dates for USDA Zone 4a
Start indoors
Mar 22
Transplant
May 24
Harvest (~75d)
Aug 7
In Zone 4a, the average last spring frost is around May. Tomatoes is a tender crop, so give it a head start indoors about 7 weeks before that, then move it out after frost danger passes.
Last spring frost
May 10
First fall frost
Sep 22
Growing season
135 days
Full Tomatoes grow guide → · All crops for Zone 4a →
Frequently asked questions
When should I start tomatoes in Zone 4a?
Start tomatoes seeds indoors around Mar 22 (Zone 4a).
Can I direct sow tomatoes in Zone 4a?
Tomatoes is best started indoors and transplanted in Zone 4a rather than direct sown.