Green beans are one of the most productive vegetables you can grow: a short row of bush beans or a wigwam of climbing beans will give you baskets of pods all summer. They are also easy — they germinate fast, grow fast, and even feed the soil as they go.
Beans need warmth to get going and then they race away.
Green Beans at a glance
| Growing factor | What green beans need |
|---|---|
| Sun | full sun |
| Soil pH | 6.0–7.0 |
| Days to germination | 7–10 |
| Days to maturity | 50–65 |
| Spacing | 4–6 inches |
| Water needs | moderate |
| Cold tolerance | tender |
| Family | Fabaceae |
Starting seeds
This is a direct-sow crop: the seed goes straight into the garden where it is to grow, and the plants are not transplanted. Prepare a fine, weed-free seed bed, sow at the depth shown on the seed packet, and keep the bed evenly moist until seedlings appear — expect germination in 7–10 days.
Sow too early into cold, wet soil and germination stalls; sow too late and the plants run out of season. Use our frost-date calculator and the hardiness-zone finder to place your sowing window. Zones 11–13 are frost-free, so sowing windows there are set by heat and rain rather than frost — check your local extension service.
Green beans are sown direct where they are to grow, once the soil is warm — seed sown into cold soil often rots instead of germinating. Sow in short rows or around the base of a wigwam of canes for climbing types, and water the drill before sowing rather than after, so the seed sits in moist soil without being washed about. Germination is usually quick in warm soil.
Transplanting and planting out
Beans are not usually transplanted, though you can start a few indoors in pots if you want the earliest possible crop — handle them carefully, as the roots dislike disturbance. The main job after sowing is to guide climbing types onto their supports: twine the young stems gently around the canes and they will climb on their own from there. Bush types need no support at all.
Space plants 4–6 inches apart — crowding is one of the commonest causes of small harvests. Our plant-spacing calculator works out how many plants fit your bed.
Soil and feeding
Green Beans grow best in rich, well-drained soil with plenty of organic matter. Dig in compost before planting: it improves heavy soil, helps light soil hold moisture, and feeds the soil life that feeds your plants. Aim for a soil pH of 6.0–7.0 — a simple soil test will tell you where you stand, and garden lime or sulfur can nudge pH up or down over a season, so test before you amend rather than guessing.
Feed lightly and steadily rather than in one heavy dose: too much fast nitrogen late in the season pushes leafy growth at the expense of the part you eat. Our fertiliser calculator works out amounts for your bed size, and the soil-volume calculator tells you how much mix a new bed needs.
Watering
Water needs are moderate: keep the soil evenly moist, watering deeply when the top inch or two dries out. Deep, infrequent watering builds deeper roots than a daily sprinkle.
Water at the base of the plant, in the morning, so the leaves dry quickly and the water reaches the roots. Our watering calculator gives a starting point for your bed size, and the watering schedule generator can build a routine around it. A mulch layer cuts evaporation and keeps moisture even.
Sunlight and temperature
Green Beans need full sun — a spot that gets sun for most of the day. Our sunlight calculator can check your spot.
This crop is rated tender for cold tolerance, so frost will kill it: it needs warm soil and frost-free nights, and should only go outside once all danger of frost has passed. In Zones 11–13, which are frost-free, it can be grown for much of the year, though the hottest months may still stress it. Our hardiness-zone finder will confirm your zone, and the frost-date calculator gives you the frost dates to plan around.
Pests and diseases
The pests and diseases most often reported on green beans are aphids, bean beetles, slugs, cutworms. Healthy, well-watered plants resist attack better than stressed ones, and rotating beds so the Fabaceae family does not repeat in the same spot helps keep soil-borne problems down.
- Aphids — small sap-sucking insects on new growth; wash off with a strong jet of water and encourage ladybirds.
- Bean Beetles — skeletonise leaves, leaving a lacy pattern; hand-pick beetles and check leaf undersides for yellow egg clusters.
- Slugs — chew ragged holes in leaves at night; water in the morning so the surface dries by evening.
- Cutworms — caterpillars that chew through young stems at soil level; a cardboard collar around each stem protects it.
Inspect plants weekly, especially leaf undersides, and act early. Our pest-identifier helper can help identify what you are seeing.
Companion plants
Good companion plants for green beans include:
- Marigolds — their roots discourage some soil pests
- Basil — attracts pollinators
- Onions — their scent is said to confuse pests
- Lettuce — shallow-rooted, fills gaps without competing
Our companion-planting finder can suggest more pairings for your bed plan.
Harvesting
Pick green beans young, when the pods are slim and snap cleanly — pick them every two or three days, because pods left too long turn tough and stringy and slow the plant down. The more you pick, the more the plant produces, so a regular picking routine is the secret to a big harvest. Pick in the morning when the plants are dry, and snap or cut the pods off rather than tearing them.
Expect the crop to be ready about 50–65 days after sowing, though weather and variety shift that window by a week or two either way. Our harvest-date calculator works out your expected harvest date from your sowing date, and the vegetable-yield estimator can estimate how much a bed should produce.
Common problems and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| Seed rotting instead of germinating | cold, wet soil | Wait until the soil is properly warm before sowing, and sow into moist rather than soaking soil. |
| No pods forming | very hot weather or flowers not being pollinated | Beans usually recover once a heatwave passes, so keep watering steadily and be patient. |
| Tough, stringy pods | pods left on the plant too long | Pick little and often, every two or three days in peak season. |
Seed rotting instead of germinating
Wait until the soil is properly warm before sowing, and sow into moist rather than soaking soil.
No pods forming
Beans usually recover once a heatwave passes, so keep watering steadily and be patient.
Tough, stringy pods
Pick little and often, every two or three days in peak season.
Frequently asked questions
When should I plant green beans?
Start seeds indoors before your last frost and plant out only after all frost danger has passed, since this is a tender crop. For zone-specific timing, see zone 5 or zone 7, and check your local extension service for the dates that fit your area.
How long do green beans take to grow?
Green Beans take 50–65 days from sowing to maturity, and seed germinates in 7–10 days. Weather and variety shift the harvest window by a week or two, so judge readiness by look and feel rather than the calendar alone.
How far apart should I plant green beans?
Space plants 4–6 inches apart — that is the room a mature plant needs, and crowding means poor airflow and small harvests. Our plant-spacing calculator works out how many fit your bed.
Should I grow bush beans or pole beans?
Bush beans are compact, need no support and give a big crop over a few weeks — ideal for small beds. Pole or climbing beans take up less ground space, crop over a much longer season and are easier to pick, but they need a sturdy wigwam or trellis.