Skip to content
OrtoClima Calendario locale dell'orto
Green bean

Crop profile

Green bean crop profile

A productive, tidy legume, best sown in mild soil and picked often while pods are young.

Italiano

Starting method

Direct sowing

Direct soil

13 °C

Transplant soil

not available

Night minimum

8 °C

Frost buffer

7 days

Heat stop

35 °C

Harvest

50–60 days

Indoor lead

not available

Key temperatures

  1. 0
  2. 5
  3. 10
  4. 15
  5. 20
  6. 25
  7. 30
  8. 35
  9. 40 °C
  • Below 13 °CCold risk: slower growth or cold damage.
  • 13 °CMinimum threshold to start direct sowing: 13 °C.
  • 13–30 °CBest range for growth and production.
  • 30–35 °CPerformance drops and plants move into stress.
  • Above 35 °CPause transplants: heat stress risk.

Green bean cycle

  1. 1. Start

    Method:
    direct sowing

  2. 2. Direct sowing

    Soil: at least 13 °C
    Night minimum: at least 8 °C

  3. 3. Growth

    Ideal temperatures 13–30 °C
    Avoid peaks above 35 °C

  4. 4. Harvest

    First harvest around:
    50–60 days after sowing

How to start

  • Recommended method: direct sowing.
  • Prepare the bed when soil and nights are stable.
  • Sow when soil has reached at least 13 °C and nights stay above 8 °C.

Temperatures to respect

  • Direct-sowing soil: minimum 13 °C.
  • Night minimum: minimum 8 °C.
  • Heat stop: 35 °C.
  • Suggested frost buffer: 7 days.

Harvest timing

  • Cycle to first harvest: about 50–60 days.
  • Harvest gradually as produce reaches maturity.

Seasonal notes

  • Protect young plants from late frosts and thermal swings.
  • In summer, avoid water stress and heat peaks above 35 °C.
  • Steady growth improves development and harvest quality.

FAQ and sources

When should you sow green beans?

Sow green beans directly when the soil is at least 13 °C, nights stay above 8 °C, and the frost risk has been over for about a week. They dislike cold, wet soil: seeds rot easily. In many areas it is best to sow successively from late spring to early summer. The cycle is quick, about 50-60 days. For continuous production, make new sowings every 2-3 weeks while the weather remains suitable.

Are dwarf or climbing green beans better?

Dwarf green beans are lower, need no major support, and produce in a concentrated period: they are practical for quick harvests and small beds. Climbing beans use less ground space but need strong nets or poles, and they often produce for longer. The choice depends on your space and how much time you want to spend harvesting. In both cases, provide sun, warm soil, and regular watering during flowering and pod formation.

When should you harvest green beans?

Pick green beans when the pods are tender, full, but not swollen with seeds. If you wait too long, they become fibrous and the plant slows down production. Check plants every two or three days during peak yield. The usual harvest window starts 50-60 days after sowing, but variety and temperature matter. Pick gently, holding the stem with one hand so you do not break flowers and new shoots.

Why do green beans flower but make no pods?

The most common causes are intense heat, drought, dry wind, or too much shade. Very high temperatures, even below the theoretical 35 °C limit, can reduce pod set and quality. Water regularly during flowering, mulch the soil, and do not overfeed with nitrogen: legumes already make plenty of leaf growth in rich soil. If you grow climbing beans, make sure the supports do not create a dense, poorly ventilated tangle.

Do green beans enrich the soil?

Yes. As legumes, they work with root bacteria that can fix nitrogen, but that does not mean they grow well without care. They need loose, warm soil and not too much nitrogen fertilizer. After the crop, if plants are healthy, you can leave the roots in the soil and compost the tops. In crop rotation, green beans are useful before demanding leafy crops. Still, avoid growing them every year in the same spot to limit soil diseases.

Related pages