- In the greenhouse or conservatory, control temperature and sunlight levels carefully to avoid extremes, using combinations of heating, ventilation and white greenhouse paint as appropriate. A good maximum-minimum temperature thermometer is essential. Poor quality greenhouses often lack adequate ventilation arrangements and temporary removal of glass panes during summer can help remedy this lack. Polythene tunnels have few options for decreasing the temperature except using extra shading or installing wind-up sides to increase ventilation.
- Managing temperature is almost impossible for tomatoes grown outdoors.
- Feed regularly to maintain high soil fertility. Special tomato fertilisers have high levels of potassium to encourage good fruit development.
- Water to maintain a constant level of soil moisture. This is especially important when growing in growing bags, pots or other containers. Outdoors, water to maintain as constant a level of soil moisture as possible. Plants grown in border soil, indoors or out, usually have a more extensive root system which helps protect them from fluctuations in water supply.
As fruit splitting and cracking is a physiological rather than a pest or disease problem, there is no point in using pesticides to treat the problem. There are no chemical controls.
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