Spinach is the most important vegetable of Rabi season and requires a cool and moist climate. Low temperature and high humidity helps in the development of succulent, tenders mild flavored foliage and quick growth. The plant prefers sunshine.For seed development and maturity, plant requires long and warm days. Spinach germinates best at soil temperature below 10-12c. At high temperature, the seed fails to germinate because they enter into a dormant state which continues until the temperature again falls below 10-12oc.Spinach can be grown successfully on a variety of soils, but a fertile sandy loam high in organic matter is preferred. The use of cover crops and green manure crops is recommended to maintain the soil organic matter. The soil pH should range between 6.4 to 6.8. Spinach is very sensitive to acid soils, thus a soil test prior to planting this crop should be made. Low germination, yellowing and browning of margins and tips of seedling leaves, browning of roots, general slow growth and even death of plants, may indicate that the soil is too acid. If the pH is too high, leaves may have a yellow color referred to as chlorosis.