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. Mustard Greens 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 Oct 1 for a second harvest before frost.
Common questions
How long does mustard greens take to grow in zone 7a?
Mustard Greens matures in about 25–40 days from sowing. In zone 7a that means sowing around Mar 16 and first picking around Apr 10.
Will mustard greens survive frost in zone 7a?
Yes — mustard greens 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 mustard greens in zone 7a?
Yes — in zone 7a there's time for a fall sowing around Oct 1 for a second harvest before frost.
For soil, spacing, pests and companion planting, see the full mustard greens growing guide →