Plant Pumpkins in Zone 5b
Seed-starting, transplant & harvest dates for USDA Zone 5b
Zone 5b averages 166 frost-free days, running from a last spring frost around April 25 to a first fall frost around October 8. Pumpkins needs roughly 100 days from planting out to first harvest, so it uses about 60 percent of that window. Pumpkins is a tender crop, which is what decides where in the window it belongs.
Because pumpkins needs a head start, sow seed indoors around Apr 4, about 3 weeks ahead of the Zone 5b last frost. Transplants go out around May 9. Starting earlier than that in Zone 5b usually backfires: plants outgrow their cells and stall when they finally hit cold soil.
Fall planting: pumpkins in Zone 5b
Pumpkins has no useful fall window in Zone 5b. Pumpkins are already a fall harvest, but they are planted in early summer. There is no second sowing.
Pumpkins are already a fall harvest, but they are planted in early summer. There is no second sowing.
Fall dates are counted backward from the Zone 5b average first frost, not forward from a sowing date. See the fall planting calendar by zone for the full method.
Spring vs fall pumpkins in Zone 5b
| Planting | Sow or start | In the ground | Harvest |
|---|---|---|---|
| Spring | Apr 4 | May 9 | Aug 17 |
| Fall | — | — | — |
Pumpkins in nearby zones
Further reading on pumpkins
- When to start seeds indoors by zone
Indoor start dates for pumpkins, counted back from your last frost.
- Hardening off seedlings: a schedule
A day by day plan for moving pumpkins seedlings outdoors.
- Best grow lights for seed starting
What light seedlings actually need, and which fixtures deliver it.
Other crops in Zone 5b
Frequently asked questions
When should I start pumpkins in Zone 5b?
Start pumpkins seeds indoors around Apr 4 (Zone 5b).
Can I direct sow pumpkins in Zone 5b?
Yes, direct sow around May 9.
Can I plant pumpkins in the fall in Zone 5b?
Pumpkins has no useful fall window in Zone 5b. Pumpkins are already a fall harvest, but they are planted in early summer. There is no second sowing.
Will pumpkins survive frost in Zone 5b?
No. Pumpkins is a tender crop and a single light frost ends it, so every Zone 5b planting has to finish before the average first frost.