Planting Dates for Maine
Maine's northern location means shorter growing seasons, especially inland and in the north. Coastal areas benefit from ocean-moderated temperatures, while Aroostook County is famous for its potato production.
USDA Zones 3b-6a • 100-160 frost-free days depending on location
Frost Dates in Maine
Average last spring frost and first fall frost dates for Maine cities. Use these to calculate your planting windows.
| City | Last Spring Frost | First Fall Frost | Frost-Free Days | USDA Zone |
|---|---|---|---|---|
| Portland | May 1 | Oct 10 | 162 | 5b |
| Bangor | May 12 | Sep 28 | 139 | 5a |
| Caribou | May 25 | Sep 18 | 116 | 4a |
Gardening Tips for Maine
- ✓Coastal Maine gardens enjoy 140+ frost-free days with milder conditions.
- ✓Northern Maine has short seasons — choose varieties maturing in 55-70 days.
- ✓Use cold frames and row covers to extend the season by 4-6 weeks.
- ✓Maine's acidic soils benefit from regular lime applications for most vegetables.
What to Plant in Maine
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 Maine
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Frequently Asked Questions
When is the last frost date in Maine?
Last frost dates in Maine vary by city: Portland (May 1), Bangor (May 12), Caribou (May 25).
What USDA hardiness zones are in Maine?
Maine spans USDA hardiness zones 3b-6a. Your specific zone determines which perennials survive winter and when to start planting annuals.
What vegetables grow best in Maine?
Hardy crops like peas, kale, spinach, and garlic thrive across Maine. 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 Maine?
100-160 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.