How long do bean seeds take to germinate?

About 7–10 days in warm soil, around 21–27°C (70–80°F). In soil colder than about 16°C (60°F) they sprout slowly and often rot first.

Should I soak bean seeds before planting?

It's not necessary, and long soaks can crack the seed or make it rot in cool soil. Sowing into moist, warm soil and watering once works best.

How long do beans take to grow from seed to harvest?

About 50–60 days for bush beans and 60–70 days for pole (climbing) beans, depending on the variety and the weather.

Why are my bean plants flowering but not making pods?

Usually heat or drought stress: daytime temperatures above about 32°C (90°F) or dry soil make bean flowers drop. Pods set again once conditions ease.

What's the difference between bush and pole beans?

Bush beans grow as compact plants that need no support and crop over a few weeks; pole beans climb 1.8 m (6 ft) or more, take a little longer to start, but keep producing over a longer season.

Bean Growth Stages and Life Cycle, From Seed to Harvest

Bean growth stages: the seed swells in 1–3 days, a hooked stem breaks the soil around day 4–8, flowers open at about 5–7 weeks, and pods are ready to pick 50–60 days after sowing for bush beans (60–70 for pole beans).

Seed to sprout: germination

How a green bean seed transforms into a visible sprout.

Germination timeline

1
Sow the seed
Day 0
Sow directly outdoors 2.5–4 cm (1–1½ in) deep once the soil has warmed to at least 16°C (60°F) — beans dislike root disturbance, and in cold, wet soil the seed tends to rot before it sprouts.
→ Seed in warm soil

Read the steps as text

Sow the seed. Day 0 Sow directly outdoors 2.5–4 cm (1–1½ in) deep once the soil has warmed to at least 16°C (60°F) — beans dislike root disturbance, and in cold, wet soil the seed tends to rot before it sprouts.
The seed soaks up water and swells. Day 1–3 A bean seed takes up a lot of water quickly, swelling noticeably and splitting its seed coat. This is why soaking or heavily watering seed in cold soil is risky — a saturated seed that can't start growing soon rots.
A hooked stem pulls through the soil. Day 4–8 The root grows down first, then the stem pushes up bent into a hook, dragging the two thick seed halves (cotyledons) up behind it rather than pushing its delicate tip through the soil. A hard soil crust at this stage can trap the hook below ground.
Stem straightens and leaves unfold. Day 7–10 The hook straightens, lifting the fleshy cotyledons into the light, and the first pair of simple, heart-shaped leaves opens between them. The cotyledons shrivel and drop off over the next week or two as their stored food is used up.

Seed to harvest: full life cycle

Every stage of a green bean plant's life, from sowing to picking. It's drawn as a loop, the way a life cycle conventionally is — left to flower and go to seed instead of being harvested, a plant produces the seed for next year's crop.

Full life cycle timeline

1
Germination
Day 0–10
The seed swells, a hooked stem pulls the seed halves above ground, and the first leaves open — see the timeline above.
→ Sprout emerges

Read the steps as text

Germination. Day 0–10 The seed swells, a hooked stem pulls the seed halves above ground, and the first leaves open — see the timeline above.
First three-part leaves appear. Week 2–3 Above the first simple leaves comes the bean's typical leaf, made of three leaflets (trifoliate). Underground, root nodules start forming where bacteria fix nitrogen from the air — the reason beans need little nitrogen fertiliser.
Bushy or vining growth. Week 3–6 Bush beans form a compact plant around 45–60 cm (18–24 in) tall; pole (runner) beans send up twining stems that need a trellis or poles of 1.8 m (6 ft) or more to climb.
Small flowers open. Week 5–7 Small white, pink or purple flowers appear in clusters. Common beans are self-pollinating — each flower pollinates itself before or as it opens — so no bees are required, though very hot, dry weather can make flowers drop.
Pods lengthen. Week 6–8 Each pollinated flower becomes a slim pod that grows to picking size in about 1–2 weeks. Pods are best while firm and smooth, before the seeds inside start to bulge.
Ready to pick. 50–60 days (bush), 60–70 days (pole) Pick every few days: the more pods you pick, the more the plant produces. Pods left to mature turn tough and stringy, and the plant then slows down — its job of making seed is done.

Green bean growth stages infographic

Every stage on one page — free to save, print for the garden shed or classroom, or pin.

Bean plant growth stages at a glance

Germination (days 0–10): the seed soaks up water and swells, the root grows down, and a hooked stem pulls the two seed halves up through the soil before straightening.

Seedling (weeks 2–3): the first simple leaves are followed by the bean's typical three-part (trifoliate) leaves, and nitrogen-fixing nodules form on the roots.

Vegetative growth (weeks 3–6): bush beans fill out into compact plants; pole beans twine up their supports.

Flowering (weeks 5–7): small white, pink or purple flowers open and pollinate themselves.

Pods and harvest (weeks 6–10): pods reach picking size about 1–2 weeks after flowering — around 50–60 days from sowing for bush beans and 60–70 days for pole beans.

The bean seed experiment: why it's a classroom favourite

A bean seed is large enough to watch every part of germination with the naked eye, which is why the "bean in a jar" is a classic school project. Put a dry bean between a damp paper towel and the side of a clear jar: within a few days the seed coat splits, the root (radicle) grows down, and the stem arches up — the root always turns downward, whichever way up the seed was placed, because roots respond to gravity.

The two thick halves of the seed are its cotyledons, packed with stored food. In beans they're lifted above ground on the stem (called epigeal germination) — unlike peas, whose seed halves stay underground.

The full bean life cycle

Common beans are annuals: they grow from seed, flower, set pods and die in a single season. Picking pods young keeps the plant flowering, but pods left on the plant fill out, dry to a papery brown and hold mature seeds — the dry beans that can be stored, eaten or sown next year, completing the cycle from seed to seed.

Beans also enrich the soil they grow in: bacteria in their root nodules turn nitrogen from the air into a form plants can use. That's why beans need little nitrogen fertiliser — see the nitrogen cycle guide for how this fits into the bigger picture.

Frequently asked questions

How long do bean seeds take to germinate?: About 7–10 days in warm soil, around 21–27°C (70–80°F). In soil colder than about 16°C (60°F) they sprout slowly and often rot first.
Should I soak bean seeds before planting?: It's not necessary, and long soaks can crack the seed or make it rot in cool soil. Sowing into moist, warm soil and watering once works best.
How long do beans take to grow from seed to harvest?: About 50–60 days for bush beans and 60–70 days for pole (climbing) beans, depending on the variety and the weather.
Why are my bean plants flowering but not making pods?: Usually heat or drought stress: daytime temperatures above about 32°C (90°F) or dry soil make bean flowers drop. Pods set again once conditions ease.
What's the difference between bush and pole beans?: Bush beans grow as compact plants that need no support and crop over a few weeks; pole beans climb 1.8 m (6 ft) or more, take a little longer to start, but keep producing over a longer season.