Tangerines originate mainly in Guangxi.

The growing environment of oranges:

The growth and development of citrus fruit trees, blossoming and fruiting are closely related to the temperature, sunshine, water (humidity), soil, and environmental conditions such as wind, altitude, topography, and slope direction, and the temperature is the most important factor in the impact of these conditions. Even a 0.5℃ difference in temperature can sometimes produce very different results. Citrus growth and development requires a temperature of 12.5 to 37 ℃.

Fall bud differentiation requires day and night temperatures of about 20 ℃ and about 10 ℃, respectively, the root growth of the soil temperature is about the same as the ground. Too low a temperature will make the citrus frozen, sweet orange -4 ℃, Wenzhou mandarin -5 ℃ will make the branches and leaves frozen, sweet orange -5 ℃ below, Wenzhou mandarin -6 ℃ below will frostbite large branches and branches, sweet orange -6.5 ℃ below, Wenzhou mandarin -9 ℃ below will make the plant freeze.

High temperatures are also detrimental to the growth and development of citrus, air temperature, soil temperature is higher than 37 ℃, the fruit and root system to stop growing. Temperature also has a significant impact on the quality of the fruit: within a certain temperature range, usually with the temperature increase in sugar content, soluble solids increased, acid content decreased, the quality becomes better. Citrus is a shade-tolerant tree species, but to quality and yield still need good sunshine.

General annual sunshine hours of 1200 to 2200 hours of the region can grow normally. Such as good sunshine, heat-rich South China and less sunshine compared to Chongqing citrus production areas: fruit sugar content is high, acid content is low, sugar-acid ratio is high. General annual rainfall of about 1000 mm of tropical and subtropical regions are suitable for citrus planting, but due to the uneven distribution of annual rainfall and often need irrigation.

The relative moisture content of the soil is 60% to 80% is appropriate, below 60% is required to irrigate, too much rain, resulting in waterlogged soil or a high water table, poorly drained citrus orchards, will make the root system die. Citrus fruit trees require air relative humidity of about 75% is appropriate.