Care
The tomato is a plant of the nightshade family (Solanaceae). It is fairly easy to grow and will produce a good crop in optimal settings. However, tomato plants are susceptible to pests and diseases. In relatively cold regions tomatoes can only be grown during the warmest months of the year (one crop), while in warm regions they can be grown the whole year round (two crops).
Soil
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.
Climate
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.