Greenhouse technology is the technique of regulating the environmental factors for the benefit of the plant (tomato) under protective cultivation. Production of tomatoes in the greenhouse involves two stages: nursery and greenhouse. In the nursery, the plants are seeded in small cavities of the nursery tray and arranged in the nursery chamber or a small-sized tunnel where they are given maximum care. At 3–4 weeks after seeding, when they must have developed four true leaves and a well-developed root system, the seedlings are transplanted into the bigger tunnel. The transplants are given water through drip irrigation. The nutrients are supplied through fertigation in the required quantity and concentration. Pest control is done by integrated pest management system (a combination of physical, biological, and sometimes chemical control).