Zone 7a covers 30 days of last-frost dates. We measured Fayetteville, AR at Mar 31 and Ogden, UT at Apr 30. Give us your town or ZIP and we'll use ten years of daily lows recorded at your own coordinates instead of the middle of that range.
Why these dates work in zone 7a
Zone 7a's last spring frost averages Apr 13 and first fall frost Nov 12 — about 213 frost-free days. Fennel tolerates light frost, so you can sow ahead of the last-frost date and keep harvesting into the cooler fall. There's also room for a fall succession sowing around Sep 3 for a second harvest before frost.
Common questions
How long does fennel take to grow in zone 7a?
Fennel matures in about 65–80 days from sowing. In zone 7a that means sowing around Mar 30 and first picking around Jun 3.
Will fennel survive frost in zone 7a?
Yes — fennel tolerates light frost. In zone 7a you can sow a little before the last frost (around Apr 13) and keep harvesting past the first fall frost (around Nov 12).
Can I plant a second crop of fennel in zone 7a?
Yes — in zone 7a there's time for a fall sowing around Sep 3 for a second harvest before frost.
For soil, spacing, pests and companion planting, see the full fennel growing guide →