How to grow green beans

Green beans divide cleanly into two types that suit different gardens and goals. Bush beans are compact, self-supporting, and produce all at once, which is ideal for canning or freezing a bulk harvest. Pole beans climb to 6 feet or more, produce continuously from midsummer through frost, and yield more per square foot over a long season. Most beginners start with bush beans; vertical gardeners often prefer pole beans.

Both are direct-sown, warm-season crops. They could not be simpler to plant: if the soil is warm and you push a seed an inch down, something will come up.

When to plant green beans

Beans are warm-season crops that are damaged by frost and germinate poorly in cold soil. Do not sow until after your last frost date and soil temperatures have reached at least 60 degrees F (65 to 70 degrees F is ideal for rapid, uniform germination). Cold soil causes seeds to rot rather than germinate.

Bush beans lend themselves to succession planting: sow a new row every 2 weeks from your first planting date through early August for continuous harvests all summer. A single planting produces for about 2 weeks; four or five successions keeps beans coming to the table from midsummer through early fall. See succession planting for how to organize the schedule.

Pole beans do not need succession sowing because they continue flowering and setting pods as long as you keep harvesting. One planting produces from midsummer until frost.

Site and soil

Green beans are among the least demanding vegetables. They fix their own nitrogen through a symbiosis with soil bacteria, so they genuinely need less fertilizer than most crops. In fact, over-fertilizing with nitrogen pushes leafy growth at the expense of pods.

Beans grow in most soils as long as drainage is adequate. They do not need a raised bed the way carrots do, though a raised bed with good drainage works well. Avoid planting where beans grew the previous year to reduce disease pressure.

Spacing and sowing

Beans are always direct-sown. They do not transplant well and have no reason to be started indoors: germination happens within 7 to 14 days of sowing in warm soil.

Sow seeds 1 inch deep. Plant small-seeded varieties slightly more shallowly; follow the packet. Sow seeds about 2 to 3 inches apart in the row to start, then thin to 4 inches apart once plants are up. Alternatively, sow 4 inches apart from the start and skip thinning.

Use the spacing calculator to plan your bed and estimate how many seeds you need.

For pole beans, install the trellis or support structure before you sow. Driving stakes after plants are up disturbs roots. A simple trellis of 6-foot stakes with twine or netting, or a teepee of 6 to 8-foot bamboo poles, handles most tall varieties. There is no separate trellis product to recommend here since any stout stakes and string or garden netting work well, but the key is to have it in place at sowing time.

Watering and feeding

Beans need about 1 inch of water per week, either from rain or irrigation. They are relatively drought-tolerant once established but drop flowers and produce poor pods during prolonged dry spells, especially at flowering and pod-set stages.

Water deeply rather than frequently, aiming at the soil and not the leaves. Wet foliage encourages fungal diseases. See watering your vegetable garden for deep-and-infrequent watering principles.

Feeding is minimal. Work compost into the bed before planting, and most soils require nothing more. If growth looks slow and leaves are pale yellow-green, a balanced fertilizer side-dressing is helpful, but avoid high-nitrogen formulas.

Common problems

Row cover can shield young seedlings from aphids and spider mites early in the season. Remove it once plants begin to flower, since beans are self-pollinating but need air movement and benefit from insect activity.

Harvesting

Harvest is all about timing. Pick snap beans before the shape of the individual seeds inside the pod becomes visible and the pod begins to bulge. At that stage, pods are no longer succulent and become fibrous and starchy.

Bush beans: harvest the whole crop over a 1 to 2-week window, then pull the plants and resow a new succession if your season allows. Pole beans: pick every 2 to 3 days to keep the plant producing. As long as you harvest before pods mature and set seed, the plant keeps flowering.

When should I plant green beans?

After your last frost date, once soil temperature has reached at least 60 degrees F. Cold soil causes seeds to rot. In northern gardens that is often late May or early June. Use the planting calendar for your ZIP to get the precise window for your location.

Do I need to stake bush beans?

No. Bush beans are self-supporting, growing to about 2 feet tall without any support. Pole beans, however, reach 6 feet or more and require a trellis, teepee, or fence to climb. Install any support before sowing.

How often should I plant green beans for continuous harvest?

Sow bush beans every 2 weeks from your first planting date through early August. Each planting produces for about 2 weeks, so four or five successions keeps beans coming through summer. Pole beans do not need succession sowing because they continue producing until frost as long as you harvest regularly. See succession planting.

Why are my bean plants blooming but not setting pods?

The most common cause is heat: temperatures consistently above 85 to 90 degrees F cause flowers to abort. This is normal and temporary. Beans will resume pod set once temperatures moderate. Drought at flowering also causes flower drop, so keep up consistent watering.

Can I grow green beans in a raised bed or container?

Green beans grow well in raised beds. Containers work for bush types if the pot is at least 12 inches deep and wide. One large container (5-gallon or larger per plant) per bush plant gives enough root room. Pole beans need very large containers and a sturdy support, making them less practical than bush types for container growing. See container gardening.

Green beans are one of the most satisfying summer crops: sow them once the soil warms, step back for 7 weeks, then harvest prolifically. Succession-sow bush beans every two weeks and you will have fresh beans on the table from midsummer through first frost. They grow well alongside tomatoes, cucumbers, and zucchini in a summer bed.