The sweet orange prefers a warm and humid climate, with an optimal temperature of 23 to 29 degrees Celsius. Cold tolerance is poor, the critical minimum temperature of -5 ℃, when the temperature drops to -6 ℃ can cause frost damage. Large water demand, intolerant of drought. General rainfall of 1000 to 1500 mm is appropriate. The soil requirements are not strict, pH 5.5 ~ 7.5 red soil, yellow soil, purple soil, alluvial soil can grow. But pH 6.2 to 7.0, deep soil, rich in organic matter, fertile and loose soil is the best.