When to Plant Green Beans

Written & researched by Elena Marsh Gardening & Landscaping Editor

Updated February 2026

Plant green beans after all danger of frost has passed, once the soil temperature at 2 inches deep reaches 60 to 65°F — usually 1 to 2 weeks after your last spring frost. Green beans are warm-season, frost-tender plants whose seeds rot in cold, wet soil, so warm soil matters more than the calendar. For most of the US that means May to June; warm southern zones (8 to 10) plant April to May with a fall crop possible, and cold northern zones (3 to 5) plant late May to June. Bush and pole beans follow the same timing.

Beans are among the most beginner-friendly crops — direct-sown, fast, and productive — provided you wait for warm soil. Rushing them into cold ground is the one reliable way to fail. Here is how to time them precisely.

Soil temperature, not the frost date

Bean germination is governed by soil warmth. Push a soil thermometer 2 inches into the bed and let the reading, not the calendar, decide.

Because that 60°F threshold sits above the frost line, beans go in after frost and after the soil has warmed — not on the frost date. Raised beds warm faster and let you plant a little earlier.

Timing around your last frost

Green beans have zero frost tolerance, so never plant before the last frost has passed. Look up your average last spring frost date and plan to sow 1 to 2 weeks after it, once the soil confirms 60 to 65°F. If an unexpected late frost threatens young plants, cover them — a single frost will kill an emerged bean crop. Cold soil in a wet spring can push planting later than the frost date alone suggests, so always check the soil.

Planting windows by USDA zone

In the hottest zones, temperatures above 90°F during flowering cause blossom drop, so growers there aim for a spring crop and a fall crop rather than fighting midsummer heat.

Bush vs pole beans and how it affects timing

Both types share the same soil-temperature requirement, but they crop differently, which changes how you plant across the season.

• Bush beans grow 1 to 2 feet tall, need no support, and produce a concentrated harvest over two to three weeks about 50 to 60 days after sowing. Ideal for succession sowing and for canning or freezing a batch at once.
• Pole beans climb 6 to 10 feet on a trellis or poles, take 60 to 70 days to start, then produce steadily for two months or more if picked regularly. Best for a long fresh-eating harvest from a single sowing.

Many gardeners grow bush beans for early and succession crops and pole beans for a long-season backbone.

Succession sowing for a continuous harvest

Because bush beans finish quickly, staggered sowings keep beans coming all summer.

1. Sow the first crop once soil hits 60 to 65°F.
2. Sow a new short row every 2 to 3 weeks through early summer.
3. Stop about 2 months before your first fall frost so the last sowing can mature.

See the wider plan in the succession planting schedule.

How to sow, and preparing the bed

Plant bean seeds 1 to 1.5 inches deep directly in the garden — beans dislike transplanting. Space bush beans 2 to 4 inches apart in rows 18 to 24 inches apart; space pole beans 3 to 4 inches apart at the base of a sturdy trellis. Choose a spot with full sun (6 to 8 hours) and well-drained soil. Beans are legumes that fix their own nitrogen, so they need little added nitrogen — too much produces lush foliage and few pods. A light dose of a balanced or phosphorus-leaning feed is plenty; the ranked field of general feeds is in best vegetable garden fertilizer, chosen by the method in how we rank.

Beans also reward a spot that stays consistently moist without waterlogging, so a 2 inch mulch of straw applied once the soil is warm helps hold moisture and keep the shallow roots cool through summer. Avoid working among the plants when the foliage is wet, since handling wet bean leaves spreads bacterial and fungal diseases like rust and blight. Give pole beans their trellis or poles at planting rather than after, so you are not disturbing established roots later on.

Inoculant and warming the soil for a stronger start

Two extra steps help green beans establish quickly once you have hit the right window. First, because beans are legumes that partner with soil bacteria (Rhizobium) to fix nitrogen from the air, coating the seed with a garden inoculant at planting can improve nodulation and vigor, especially in a new bed or soil that has not grown beans before. It is inexpensive and harmless if the bacteria are already present.

Second, if a cool spring is holding your soil below 60°F, warm it rather than planting into cold ground:

• Lay black plastic or dark fabric over the bed for one to two weeks before sowing to lift soil temperature.
• Plant in raised beds, which warm and drain faster than flat ground.
• Use row cover over the row after sowing to trap warmth and speed emergence, removing it once plants are up and flowering begins.

Confirm the soil has actually reached 60 to 65°F with a thermometer before committing seed, since beans gain nothing from an early sowing into cold, wet soil that only rots them.

Common timing mistakes

Once your beans are up, follow the full guide at how to grow green beans, and for another warm-season crop with the same timing, when to plant cucumbers. Everything else is at the seeds and vegetable growing hub.