Last spring frostMay 7
Transplant outApr 30
First harvestApr 30
Last harvestOct 13
First fall frostOct 13
Why these dates work in zone 4a
Zone 4a's last spring frost averages May 7 and first fall frost Oct 13 — about 159 frost-free days. Raspberry 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 raspberry take to grow in zone 4a?
Raspberry matures in about 365–548 days from transplanting. In zone 4a that means setting plants out around Apr 30 and first picking around Apr 30.
Will raspberry survive frost in zone 4a?
Yes — raspberry tolerates light frost. In zone 4a you can set plants out a little before the last frost (around May 7) and keep harvesting past the first fall frost (around Oct 13).
For soil, spacing, pests and companion planting, see the full raspberry growing guide →