Zone 8b covers 47 days of last-frost dates. We measured Fort Worth, TX at Feb 18 and Eugene, OR at Apr 6. 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 8b
Zone 8b's last spring frost averages Mar 6 and first fall frost Nov 22 — about 261 frost-free days. Rhubarb tolerates light frost, so you can set plants out ahead of the last-frost date and keep harvesting into the cooler fall.
Common questions
How long does rhubarb take to grow in zone 8b?
Rhubarb matures in about 548–730 days from transplanting. In zone 8b that means setting plants out around Feb 20 and first picking around Aug 22.
Will rhubarb survive frost in zone 8b?
Yes — rhubarb tolerates light frost. In zone 8b you can set plants out a little before the last frost (around Mar 6) and keep harvesting past the first fall frost (around Nov 22).
For soil, spacing, pests and companion planting, see the full rhubarb growing guide →