Last spring frostMay 6
Direct sowApr 15
First harvestJun 14
Last harvestJul 12
First fall frostOct 22
Why these dates work in zone 3b
Zone 3b's last spring frost averages May 6 and first fall frost Oct 22 — about 169 frost-free days. Shallot tolerates light frost, so you can sow ahead of the last-frost date and keep harvesting into the cooler fall.
Common questions
How long does shallot take to grow in zone 3b?
Shallot matures in about 60–80 days from sowing. In zone 3b that means sowing around Apr 15 and first picking around Jun 14.
Will shallot survive frost in zone 3b?
Yes — shallot tolerates light frost. In zone 3b you can sow a little before the last frost (around May 6) and keep harvesting past the first fall frost (around Oct 22).
For soil, spacing, pests and companion planting, see the full shallot growing guide →