Green bean
Phaseolus vulgaris · Fabaceae
📷 Rasbak · CC BY-SA 3.0
The gardener's calendar
It's peak harvest for green bean: pick regularly and at the right stage to boost production and extend the season.
ID card
- Family
- Fabaceae
- Growth type
- Climbing twiner
- Foliage
- Deciduous, light green
- Flowering
- June to July, white or purple flowers
- Mature size
- 50 cm in height (on support)
- Hardiness
- Low hardiness, frost-sensitive
- Edibility
- Yes, pods harvested young
- Origin
- Central and South America
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Sow directly in place in late May, spaced 20 cm apart, in rich, well-draining soil. Water regularly and generously: this plant loves coolness but hates excessive lime.
The common mistake
Harvesting pods too late (when they turn yellow): they become hard and fibrous.
The pro's trick
Install a support stake or trellis before sowing.
Care
Sunlight
Green beans require full sun exposure (minimum 6 to 8 hours) for optimal production. A south or southwest-facing location is ideal. Avoid partial shade, which limits flowering and fruiting.
Watering
Keep the soil regularly moist, especially during growth and flowering periods. Watering 2 to 3 times per week is generally necessary in summer. Avoid wetting the foliage in the evening to prevent fungal diseases.
Soil and planting
Prefer rich, well-draining soil that is slightly acidic to neutral. Enrich the soil with compost or well-decomposed manure before planting. Sow after the last frosts, when the soil is warmed (at least 15°C).
Training and support
Install a support (trellis, stake, or wire) from sowing to guide the climbing growth. Gently tie young stems. Pinch off the tip after 50 cm of height to encourage branching and extend production.
Fertilization
Beans are low-demand thanks to their symbiosis with nitrogen-fixing bacteria. An application of balanced fertilizer every 3 to 4 weeks from flowering supports production. Avoid excess nitrogen, which stimulates foliage at the expense of pods.
Diseases and pests
Watch for powdery mildew and anthracnose, particularly in humid conditions. Watering at the base prevents these infections. Aphids and spider mites may appear: apply integrated pest management (soapy water, beneficial insects). Remove diseased plants promptly.
Did you know?
The green bean arrived in Europe in the 16th century from Mexico and the Andes of South America, where pre-Columbian civilizations had cultivated it for over 5,000 years. It was initially considered an ornamental plant before conquering European tables. In France, it became widely popular from the 17th century onward, becoming a major market garden crop.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.