Last spring frostMay 7
Start seeds indoorsMar 12
Transplant outMay 21
First harvestJul 30
Last harvestOct 6
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. Pepper is frost-sensitive, so the 2w after frost timing builds in a safety margin against a late cold snap — setting plants out too early risks losing them to frost. Starting seeds indoors 8 weeks ahead gives strong transplants ready the moment the soil warms.
Common questions
How long does pepper take to grow in zone 4a?
Pepper matures in about 70–90 days from transplanting. In zone 4a that means setting plants out around May 21 and first picking around Jul 30.
Will pepper survive frost in zone 4a?
No — pepper is frost-sensitive. In zone 4a, wait until after the last frost (around May 7) to plant, and harvest before the first fall frost (around Oct 13).
For soil, spacing, pests and companion planting, see the full pepper growing guide →