Beans are the summer workhorse of the vegetable garden: hugely productive, easy to grow, and — like peas — they feed the soil with nitrogen as they grow. A single wigwam of runner beans can produce kilos of pods over the summer, and French beans are among the fastest crops from sowing to plate.
This guide covers the three beans beginners grow most — French beans, runner beans and broad beans — including the one rule they all share (never sow before the frost is past) and the picking habit that keeps them producing. Written for Central and Western Europe.
| Care point | What beans need |
|---|---|
| Sun | Full sun — a warm, sheltered spot |
| Water | Regular once flowering; never let them dry out |
| Soil & pH | Rich, moisture-retentive; pH 6.0–7.0; compost helps |
| Sow (Central Europe) | French/runner: May–June; broad beans: Feb–Apr or Oct–Nov |
| Spacing | 20–25 cm apart; climbing beans up supports |
| Days to harvest | 60–90 days from sowing |
| Difficulty | Easy — if you wait for warm soil |
Step 1: Know your three beans
French beans (green beans) come in climbing and dwarf (bush) types. Dwarf French beans are the fastest and simplest — no supports needed, harvest in about 60 days. Climbing French beans crop over a longer season. Runner beans are the classic tall climbers with showy red flowers and long flat pods — hugely productive and a garden favourite. Broad beans are the hardy one: sown in late winter or autumn, harvested in early summer before the others even start.
For a first year, grow dwarf French beans (fast, no supports) plus one wigwam of runner beans (spectacular and productive). Add broad beans in year two — they need an earlier start and their own timing.
Step 2: Wait for warm soil — the golden rule
Beans rot in cold, wet soil faster than almost any seed. Never sow French or runner beans before mid-May in Central and Western Europe — soil needs to be at least 12°C, and night frosts must be over. Sowing a week late into warm soil always beats sowing early into cold mud; late sowings catch up within days.
Broad beans are the exception: they are hardy and go in February to April (or October–November in mild areas for overwintering varieties like 'Aquadulce Claudia'). If you are unsure about frost dates, start French and runner beans in pots indoors in late April and plant out after the frost — a two-week head start with zero risk.
Step 3: Sow simply, in rich soil
Beans are hungry plants that appreciate rich soil: work compost into the bed before sowing (see our soil basics guide). Sow seeds 5 cm deep — deeper than most vegetables, which protects them from drying out and from mice. Space dwarf beans 20 cm apart in rows 40 cm apart; climbing beans 20–25 cm apart around their supports.
Water after sowing and keep the soil moist until seedlings appear (7–14 days in warm soil). If germination is patchy, the soil was too cold — wait a week and re-sow rather than nursing struggling seedlings.
Step 4: Build supports for climbers
Climbing French beans and runner beans need strong supports — a mature wigwam in full leaf catches serious wind. The classic is a wigwam of 2.4 m canes: 6–8 canes in a circle, tops tied together, one or two beans per cane. Alternatively, use a row of canes with crossbars (like a goalpost frame) or sturdy netting on posts.
Erect supports before sowing or planting — pushing canes in afterwards damages roots. Plant climbing beans at the base of each cane and they will twine up naturally (runner beans twine anticlockwise, if you want to help them along). Dwarf French beans need no support at all — one reason beginners love them. For small spaces, dwarf beans in pots work brilliantly.
Step 5: Water generously — beans are thirsty
Beans need more water than most vegetables, especially once flowering starts: drought at flowering causes flowers to drop without setting pods — the most common reason for a disappointing bean harvest. Water deeply 2–3 times a week in dry weather, directing water at the base. Mulch thickly to keep moisture in; see our watering guide for the full technique.
Runner beans in particular hate dry air — in hot, dry spells, misting the flowers in the evening improves pod set. Like peas, beans fix their own nitrogen, so do not overfeed with nitrogen fertiliser; rich compost at planting is enough.
Step 6: Pick little and often — the more you pick, the more you get
This is the secret of bean abundance: pick every 2–3 days. Young, tender pods signal the plant to keep flowering; pods left to mature and swell tell it the job is done and production stops. French beans are best picked young and slender; runner beans when pods are 20–30 cm but still snap crisply; broad beans when pods feel full but the beans inside are still small and sweet.
At the end of the season, leave the roots in the ground like peas — the nitrogen nodules benefit next year's crop. And do not plant beans where beans, peas or other legumes grew last year; rotate them around the garden.
Troubleshooting: common bean problems
Seeds rotted in the ground: Sown too early into cold, wet soil — the number one bean failure. Wait until mid-May (or soil at 12°C+), sow 5 cm deep, and start a few in pots as insurance.
Flowers dropping without setting pods: Drought or very hot, dry air — especially runner beans. Water deeply and regularly from first flower, mulch, and mist flowers on hot evenings. Plants usually recover and set pods when conditions improve.
Blackfly (black aphids) covering the tops: Classic broad bean problem, also hits runners. Pinch out the growing tips where aphids cluster (this also encourages side shoots), blast with water, or encourage ladybirds. Avoid spraying during flowering when bees are working.
Stringy, tough pods: Picked too late. Pick French and runner beans young and often — if a few escape and go tough, leave them to mature fully and keep the seeds for drying (haricot-style) rather than eating fresh.
What to do this October
October is not bean-sowing time — but broad bean fans can sow overwintering varieties ('Aquadulce Claudia') in mild areas now for the earliest crop next year. Everyone else: clear finished bean plants (leave the roots in for nitrogen), compost the healthy foliage, and note where beans grew for next year's rotation.
October is also for building next year's supports: a sturdy wigwam frame built now weathers in over winter and is ready for May planting. Order seeds while choice is best. See the full October checklist for the month's other jobs.
Frequently asked questions
Runner beans vs French beans — which is easier?
Dwarf French beans are easiest (no supports, fastest harvest). Runner beans need supports and more water but produce far more per plant. Grow both if you have room — they complement each other.
Can I grow beans in pots?
Dwarf French beans are excellent in pots (30 cm deep minimum). Climbing beans work in very large pots with a wigwam of canes, but they drink a lot — check water daily in summer.
Why do my bean flowers fall off?
Almost always drought or heat stress at flowering. Water deeply and consistently from the first flower, mulch the bed, and avoid planting in the most exposed, windy spot.
Are broad beans worth growing?
Yes — they crop in early summer when little else is ready, they are hardy and reliable, and the young beans are delicious. They do get blackfly, but pinching out the tips usually controls it.
Related guides
- How to Grow Peas at Home: Beginner's Guide — the other nitrogen-fixing family
- Raised Bed Gardening: Build Your First Bed — the perfect home for a bean wigwam
- How to Water Your Vegetable Garden: A Beginner's Guide — beans are thirsty; water them right
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