Plant Basil in Zone 4b
Seed-starting, transplant & harvest dates for USDA Zone 4b
Start indoors
Mar 24
Transplant
May 19
Direct sow
May 19
Harvest (~60d)
Jul 18
In Zone 4b, 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 5
First fall frost
Sep 28
Growing season
146 days
Full Basil grow guide → · All crops for Zone 4b →
Frequently asked questions
When should I start basil in Zone 4b?
Start basil seeds indoors around Mar 24 (Zone 4b).
Can I direct sow basil in Zone 4b?
Yes, direct sow around May 19.