Temperature plays a very important role in fruiting of crops. Even if soil, water, and fertilizers are managed well, improper temperature during flowering and fruiting can reduce yield heavily. Many farmers notice good plant growth but poor flower retention or fruit drop, and temperature stress is often the main reason. Understanding the optimal fruiting temperature helps farmers plan sowing time, irrigation, and crop selection better.
Fruiting is the stage when flowers turn into fruits after pollination. During this period, crops are very sensitive to both high and low temperatures. If the temperature goes beyond the suitable range, flowers may drop, pollination may fail, or fruits may not develop properly. Each crop has its own preferred temperature range, but most fruiting crops perform well under moderate conditions.
For many vegetable crops like tomato, brinjal, chilli, okra, and beans, the ideal fruiting temperature generally ranges between 18°C and 30°C. Tomato fruits best around 20–25°C. When temperatures rise above 35°C, pollen becomes weak, flowers drop, and fruit setting reduces. Similarly, very low temperatures below 15°C slow down pollination and fruit growth.
In pulse crops such as Bengal gram, pigeon pea, and green gram, fruiting is best under cool to mild temperatures, usually between 15°C and 25°C. High temperatures during flowering cause flower drop and poor pod formation. Sudden heat waves during this stage can reduce yield drastically.
For oilseed crops like groundnut, sunflower, and mustard, fruiting and seed setting perform well between 20°C and 30°C. Mustard prefers slightly cooler conditions during flowering and pod development. Excess heat during flowering reduces seed filling and oil content.
In fruit crops, temperature requirements vary more. Mango fruits best when flowering occurs in cooler conditions (around 18–22°C), followed by warm weather during fruit development. Banana prefers warmer temperatures, usually between 22°C and 32°C, for proper bunch development. Grapes require mild temperatures during flowering and warmer, dry conditions during berry growth.
High temperature stress during fruiting leads to problems such as flower drop, poor fruit size, cracking, sunburn, and misshapen fruits. On the other hand, very low temperatures slow down metabolic activity, resulting in delayed fruiting and poor quality produce. Sudden temperature fluctuations are more harmful than steady conditions.
Farmers can manage temperature effects to some extent through proper sowing time. Choosing the right planting window ensures that flowering and fruiting occur during favorable weather. Irrigation helps reduce heat stress by cooling the soil and plant canopy. Light irrigation during hot periods improves flower retention. Mulching with straw or crop residues helps maintain soil temperature and moisture.
In protected cultivation like polyhouses or shade nets, temperature can be regulated more effectively. Ventilation, shading, and misting help maintain optimal conditions for fruiting, especially in high-value crops.
In conclusion, optimal fruiting temperature for most crops lies between 18°C and 30°C, depending on crop type. Extreme heat or cold during flowering and fruiting reduces yield and quality. By adjusting sowing time, managing irrigation, and using simple practices like mulching and shade, farmers can protect crops from temperature stress and achieve better fruit set and higher yields.
