Regular and reasonable irrigation during development and fruiting stage will help to avoid physiological problems such as blossom end rot. Especially during the fruiting stage the plants need a high amount of water. However, avoid prolonged leaf moisture as this favors fungal growth. Placing stakes in the soil at the time of planting will later on help to keep the developing tomato fruit off the ground. In greenhouses it is also possible to use strings or special cages.
The growth of tomato plants is adapted to well-drained, loamy soils, with a slightly acidic pH between 6 and 6.8. Root zones should be kept moist, but not soggy. Tomato roots may grow 3 meters deep in optimal conditions, therefore, it is important that the soil is loose and water can run freely. Hard pans and heavy clay soils may restrict growth in the root zone and cause unhealthy plants that have stunted growth and reduced yields.
Tomato is a warm-season crop that is self-pollinated. Tomatoes are frost-tender plants that thrive in warm weather, and therefore must be planted after the last spring frost has passed. In regions having less than 3½ months frost-free period the tomato is not likely to be profitable. Full sun exposure is important and the plants should get at least 6 hours of sunlight. The optimal temperature for germination is between 21 and 27°C. Temperature below 10°C and above 35°C lead to very poor germination. Although they can be planted any time after this date, tomatoes grow best when day temperatures are above 16°C and nighttime temperatures do not fall below 12 °C. Greenhouse ventilation/heating systems can be used in areas not fulfilling these needs.