A Complete Analysis of the Latest Growing Conditions for Green Beans

Green beans originated in Central and South America and were introduced to Asia between the 17th and 19th centuries. Green beans can be widely grown in both northern and southern China. Today I would like to share with you the growing conditions for green beans.

Temperature requirements

Green beans prefer warmth and are not tolerant of frost. The temperature range for seed germination is 20-30°C; below 10°C or above 40°C they cannot germinate. Seedlings are sensitive to temperature changes; when exposed to 2-3°C for a short period they begin to lose their green color, and at 0°C they suffer frost damage.

Light requirements

They are short-day plants, but different varieties respond differently to photoperiod and can be divided into 3 types: first, the photoperiod-sensitive type; second, the photoperiod-insensitive type; third, the moderately photoperiod-sensitive type.

Water requirements

Green beans have a well-developed root system with many lateral roots, and are relatively drought-tolerant but not waterlogging-tolerant. Seed germination requires sufficient water absorption, but if there is too much water, the soil lacks oxygen and the seeds are prone to rotting. The suitable field water-holding capacity during the plant growth period is 60-70% of the maximum water-holding capacity. The flowering period has strict water requirements, and the suitable relative air humidity is 65-80%.

Soil and nutrient requirements

Green beans are best cultivated in soil with a deep, loose layer, abundant humus, and good drainage. Sandy loam, loam, and general clay soil can all support growth, but they should not be cultivated in low, wet land or heavy clay. The suitable pH is 6-7. It should not be too acidic or too alkaline. Green beans absorb large amounts of nitrogen and potassium, and less phosphorus. They also need a certain amount of calcium fertilizer.