When to Plant Pumpkins in Alaska
From jack-o-lanterns to pies, pumpkins need space and time but deliver a uniquely satisfying harvest.
The Short Answer
Alaska Frost Dates
Your planting dates depend on which part of Alaska you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Interior Alaska | 1a, 2a, 2b | May 15 - Jun 1 | Aug 20 - Sep 10 |
| Southcentral Alaska | 3b, 4a, 4b | May 1 - May 20 | Sep 10 - Sep 25 |
| Southeast Alaska | 5a, 5b, 6a | Apr 15 - May 5 | Sep 25 - Oct 15 |
Pumpkins Planting Schedule for Alaska
Interior Alaska (Zones 1a, 2a, 2b)
Average last frost: May 15 - Jun 1 · Average first frost: Aug 20 - Sep 10
Southcentral Alaska (Zones 3b, 4a, 4b)
Average last frost: May 1 - May 20 · Average first frost: Sep 10 - Sep 25
Southeast Alaska (Zones 5a, 5b, 6a)
Average last frost: Apr 15 - May 5 · Average first frost: Sep 25 - Oct 15
Growing Pumpkins in Alaska
Pumpkins in Alaska's Climate
Pumpkin growing is a calendar countdown — count backward from your target harvest date (usually mid-October for Halloween) using your variety's days-to-maturity. In short-season zones, choose 90-day varieties and start seeds indoors 3 weeks before last frost. Black plastic mulch warms soil for earlier transplanting. Squash vine borer is less common in cold zones — a genuine advantage.
Soil Considerations for Alaska
Varies widely. Interior has permafrost challenges. Raised beds essential for warming soil. Highly acidic soils common. Make sure soil has warmed to at least 65°F before planting pumpkins outside.
Alaska Climate & Growing Season
Extreme daylight variation. Summer days of 18-24 hours of sunlight accelerate growth. Very short growing season in interior. Pumpkins cannot tolerate any frost, so wait until all frost danger has passed before transplanting outside. Watch local forecasts carefully in spring.
Growing season length varies across Alaska: Interior Alaska (1a, 2a, 2b) has a last frost around May 15 - Jun 1, while Southeast Alaska (5a, 5b, 6a) sees frost end around Apr 15 - May 5. This difference matters for pumpkins — transplant timing shifts by several weeks across the state.
Growing Tips
Count backwards from when you want ripe pumpkins (usually October). They need 90-120 days, so mid-June to early July is often ideal.
Companion Planting
Plant pumpkins alongside these companions for better growth:
Keep pumpkins away from:
The Bottom Line
Last reviewed: March 29, 2026