Plant Basil in Zone 4a
Seed-starting, transplant & harvest dates for USDA Zone 4a
Start indoors
Mar 29
Transplant
May 24
Direct sow
May 24
Harvest (~60d)
Jul 23
In Zone 4a, the average last spring frost is around May. Basil is a tender crop, so give it a head start indoors about 6 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 Basil grow guide → · All crops for Zone 4a →
Frequently asked questions
When should I start basil in Zone 4a?
Start basil seeds indoors around Mar 29 (Zone 4a).
Can I direct sow basil in Zone 4a?
Yes, direct sow around May 24.