When to Plant Beans (Green/Snap) in Maine
Easy, productive, and they even improve your soil by fixing nitrogen. A perfect crop for beginners.
The Short Answer
Maine Frost Dates
Your planting dates depend on which part of Maine you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Northern Maine | 3b, 4a, 4b | May 20 - Jun 5 | Sep 10 - Sep 25 |
| Central Maine | 4b, 5a | May 10 - May 25 | Sep 20 - Oct 5 |
| Southern/Coastal Maine | 5a, 5b, 6a | May 1 - May 15 | Sep 25 - Oct 15 |
Beans (Green/Snap) Planting Schedule for Maine
Northern Maine (Zones 3b, 4a, 4b)
Average last frost: May 20 - Jun 5 · Average first frost: Sep 10 - Sep 25
Central Maine (Zones 4b, 5a)
Average last frost: May 10 - May 25 · Average first frost: Sep 20 - Oct 5
Southern/Coastal Maine (Zones 5a, 5b, 6a)
Average last frost: May 1 - May 15 · Average first frost: Sep 25 - Oct 15
Growing Beans (Green/Snap) in Maine
Beans (Green/Snap) in Maine's Climate
Beans are one of the most reliable warm-season crops for cold climates because they grow fast and mature quickly. Direct sow when soil reaches 60°F — typically late May to early June. Bush types produce a concentrated harvest in 50-55 days, which fits easily within even 100-day growing seasons. Pole types produce over a longer window but need more time to begin bearing.
Soil Considerations for Maine
Acidic, rocky soils. Blueberries thrive naturally. Raised beds common to deal with rocks. Amendment with lime needed for many vegetables. Make sure soil has warmed to at least 60°F before planting beans (green/snap) outside.
Maine Climate & Growing Season
Short growing season but long summer days help. Maritime influence on coast. Season extension techniques very valuable. Beans (Green/Snap) 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 Maine: Northern Maine (3b, 4a, 4b) has a last frost around May 20 - Jun 5, while Southern/Coastal Maine (5a, 5b, 6a) sees frost end around May 1 - May 15. This difference matters for beans (green/snap) — transplant timing shifts by several weeks across the state.
Growing Tips
Direct sow only — beans don't transplant well. Inoculate seeds with rhizobium for better nitrogen fixation.
Companion Planting
Plant beans (green/snap) alongside these companions for better growth:
Keep beans (green/snap) away from:
The Bottom Line
Last reviewed: March 29, 2026