Native to Asia Minor and Western Asia, the pistachio tree is a deciduous, slow-growing tree that reaches a mature height and width of 25 to 30 feet and produces small, red fruits, inside of which are edible pistachio seeds. Pistachio trees are dioecious, which means they require both a male and female tree planted beside each other in order to cross-pollinate and produce fruit. Pistachio trees thrive in hot, dry climates, but require cool, longer winters for proper dormancy. Pistachio trees can tolerate winter temperatures down to 5 to 15 degrees Fahrenheit.
Select a planting location for your male and female pistachio trees that receives full sunlight. The ideal planting site will have deep, moist, but well-draining soil.
Dig a planting hole twice the width and depth of the root ball. Space the pistachio trees no more than 30 feet apart for proper cross-pollination and fruit bearing.
Loosen the displaced soil and mix in some organic compost or aged manure. Refill the planting hole partway with the amended soil, so that the hole is about the same depth as the height of the root ball.
Remove the burlap from the pistachio tree's root ball or remove the tree from the nursery container carefully. Set the pistachio tree's root ball into the planting hole so that the tree is standing straight up.
Backfill the planting hole with the amended soil, patting down the soil around the root ball. Water deeply to soak the soil around the root ball and eliminate any air pockets around the roots.
Stake the young pistachio tree to provide extra support. Insert two sturdy wooden stakes on either side of the trunk and tie the trunk to the stakes with twine.