Planting Dates for Alaska
Alaska's extreme latitude brings very long summer days that produce remarkably fast growth despite short seasons. The Matanuska Valley near Anchorage is famous for growing giant vegetables.
USDA Zones 1a-7b • 60-135 frost-free days depending on location
Frost Dates in Alaska
Average last spring frost and first fall frost dates for Alaska cities. Use these to calculate your planting windows.
| City | Last Spring Frost | First Fall Frost | Frost-Free Days | USDA Zone |
|---|---|---|---|---|
| Anchorage | May 14 | Sep 14 | 123 | 5a |
| Fairbanks | May 23 | Aug 31 | 100 | 2b |
| Juneau | May 2 | Oct 2 | 153 | 7b |
Gardening Tips for Alaska
- ✓The Matanuska Valley is Alaska's premier growing region with giant vegetable potential.
- ✓Up to 20 hours of summer daylight accelerates plant growth dramatically.
- ✓Southeast Alaska (Juneau, Ketchikan) has milder maritime conditions.
- ✓Focus on cold-hardy, fast-maturing varieties and use season extension.
What to Plant in Alaska
Cold-Hardy Crops (plant early)
These crops tolerate frost and can be planted 2-6 weeks before your last frost date.
30-60 days from sowing
55-70 days from sowing
60-80 days from sowing
50-70 days from sowing
55-80 days from transplant
35-50 days from sowing
20-35 days from sowing
July-August the following year
90-120 days from transplant
70-120 days from planting
50-70 days from sowing
50-60 days from sowing
Warm-Season Crops (plant after last frost)
Start these indoors and transplant after all frost danger has passed.
60-85 days from transplant
60-90 days from transplant
50-65 days from sowing
50-65 days from sowing
45-60 days from sowing
60-100 days from sowing
30-60 days from sowing
Get Exact Planting Dates for Alaska
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Frequently Asked Questions
When is the last frost date in Alaska?
Last frost dates in Alaska vary by city: Anchorage (May 14), Fairbanks (May 23), Juneau (May 2).
What USDA hardiness zones are in Alaska?
Alaska spans USDA hardiness zones 1a-7b. Your specific zone determines which perennials survive winter and when to start planting annuals.
What vegetables grow best in Alaska?
Hardy crops like peas, kale, spinach, and garlic thrive across Alaska. In warmer zones, tomatoes, peppers, and cucumbers do well with proper timing. Use our free calculator for exact planting dates.
How long is the growing season in Alaska?
60-135 frost-free days depending on location. Extend your season with cold frames, row covers, and indoor seed starting.
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Free Calculator
Calculate exact planting dates based on your location and frost dates.