Zone 7b covers 44 days of last-frost dates. We measured Oklahoma City, OK at Mar 12 and Reno, NV at Apr 25. 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 7b
Zone 7b's last spring frost averages Apr 4 and first fall frost Nov 12 — about 222 frost-free days. Cauliflower tolerates light frost, so you can set plants out ahead of the last-frost date and keep harvesting into the cooler fall. Starting seeds indoors 6 weeks ahead gives strong transplants ready the moment the soil warms. There's also room for a fall succession sowing around Aug 6 for a second harvest before frost.
Common questions
How long does cauliflower take to grow in zone 7b?
Cauliflower matures in about 70–100 days from transplanting. In zone 7b that means setting plants out around Mar 14 and first picking around May 23.
Will cauliflower survive frost in zone 7b?
Yes — cauliflower tolerates light frost. In zone 7b you can set plants out a little before the last frost (around Apr 4) and keep harvesting past the first fall frost (around Nov 12).
Can I plant a second crop of cauliflower in zone 7b?
Yes — in zone 7b there's time for a fall sowing around Aug 6 for a second harvest before frost.
For soil, spacing, pests and companion planting, see the full cauliflower growing guide →