Sowing French beans: wait for warm soil and choose a habit
French beans are tender. Check that the soil has warmed, then choose between dwarf beans for successive sowings and climbing beans that need support.
By Marmanda3 min read
Sow French beans outdoors after frost risk has passed and the soil reaches 15–18°C, the temperature given by the French SNHF for this cold-sensitive crop. Soil temperature, not the first mild afternoon, is the practical signal.
Check the soil before sowing
The SNHF says sowing can start in April in the Midi and south-west, then continue through August. This French window varies with altitude, exposure, variety and cover. The RHS also advises waiting until frost risk has passed and the soil has warmed, but its UK dates do not transfer directly to France.
Choose between dwarf and climbing beans
Dwarf beans stay low, need no tall support and suit short successive sowings. Climbing types need a support installed before sowing. The SNHF describes climbing beans as taller and generally later; the RHS also distinguishes their cropping period and cultivation. Choose according to the space available and check the packet for growth habit: the two types need different row layouts and supports.
Prepare the row and sow
Prepare a weed-free, loosened row and put climbing supports in place first. The RHS direct-sowing method is summarised below; French row distances follow the SNHF reference.
| Type | Direct sowing | Row layout for France |
|---|---|---|
| Dwarf | Sow 5cm deep, 15cm apart, in blocks or double rows. | 40–50cm between rows (SNHF). |
| Climbing | Sow 5cm deep, one or two seeds at the base of each support; thin to the strongest seedling after emergence. | 70–80cm between rows (SNHF). |
For climbing beans, the RHS also gives 15cm between canes in its A-frame set-up; the wider 70–80cm row spacing is the SNHF French reference. Cover, firm lightly and water gently if the soil is dry. Label the variety and date. After emergence, the SNHF advises hoeing once, then again when plants reach 10–12cm, drawing a little soil up around their bases. In hot, dry weather, water the crop, especially as pods form. For an earlier start, the RHS suggests sowing one bean 5cm deep in each small pot in a warm, bright place, then planting outside once frost has passed. Its late-April timing is British; in France follow soil temperature and local conditions.
Make successive sowings within the season
The SNHF lists sowing through August, but the useful season depends on local conditions: altitude, shade and the return of cold can shorten it. Dwarf beans can be sown in small batches while the soil stays warm; climbing beans start cropping later but may harvest for longer. Avoid a fixed interval and leave time for the final batch to grow before cold weather.
Pick tender pods regularly
The SNHF gives about 40 days from sowing as a reference for the first immature green pods; variety and conditions change that timing. For fine-podded types, it recommends picking every two to three days. The RHS uses 15–20cm pods that snap easily as its UK guide. Harvest at the size stated for your variety and handle stems gently; check higher up on climbing plants too.
The vegetable sowing and planting calendar helps fit batches into a wider plan. Our guide to sowing garden peas covers another legume but does not replace bean-specific advice. In Marmanda, you can place the row in your garden plan and record when it emerged, then compare batches next year.
References: SNHF, Haricots (in French); RHS, French beans. RHS dates are for the UK.