Last spring frostMay 6
Direct sowApr 22
First harvestAug 20
Last harvestOct 15
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. Scorzonera 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 scorzonera take to grow in zone 3b?
Scorzonera matures in about 120–150 days from sowing. In zone 3b that means sowing around Apr 22 and first picking around Aug 20.
Will scorzonera survive frost in zone 3b?
Yes — scorzonera 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 scorzonera growing guide →