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. Oregano 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 8 weeks ahead gives strong transplants ready the moment the soil warms.
Common questions
How long does oregano take to grow in zone 7b?
Oregano matures in about 60–80 days from transplanting. In zone 7b that means setting plants out around Mar 28 and first picking around May 27.
Will oregano survive frost in zone 7b?
Yes — oregano 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).
For soil, spacing, pests and companion planting, see the full oregano growing guide →