Question

Minimum temperature required for trees to grow in an area is

Answer 1

Oranges

Orange trees (Citrus sinensis) thrive in temperatures of 55 to 100 degrees Fahrenheit. They go dormant in winter, when temperatures drop to 35 to 55 degrees. Freezing weather, however, damages the fruit at 26 to 30 degrees. Young trees are also damaged and may die during frosts, while mature trees are known to have survived for 10 hours in temperatures below 25 degrees. Cold-hardy rootstocks provide some protection to grafted varieties, but oranges should be protected when frost and freezing weather threatens. 'Washington Navel' and 'Valencia' are grown in California, while Florida growers focus on 'Hamlin,' 'Pineapple' and 'Valencia.'

Grapefruits

Grapefruit trees (Citrus paradise) are possibly the most cold tender of the citrus family. First documented in Barbados in 1750, the grapefruit may be a cross between the pummel (Citrus maxima) and the orange tree. The grapefruit thrives in warm, tropical locations such as the West Indies and Caribbean. It needs heat for the fruit to ripen. 'Oroblanco' is a grapefruit and pummel hybrid that tolerates temperatures down to 30 degrees Fahrenheit.