There are many abandoned homesteads in Nevada where apple trees planted years ago still survive. They receive no regular irrigation, no pruning, spraying or fertilizer, and yet they endure. That is a tree with an extreme tolerance for abuse. There are hundreds of varieties of apple available commercially and if you are interested, please contact the Cooperative Extension Service for a pamphlet. In general, apple trees range from 6-25 ft. tall with similar width. Grow in full sun, well-drained soil and water deeply once every 7-10 days. Some annual pruning is required to encourage strong branching and fruit set, and some annual spraying may also be necessary. This tree is a valuable food source for birds, squirrels, rabbits and deer. This deciduous tree is not temperature sensitive or disease prone and does not need protection.