Lemon trees (Citrus limon) are one numerous citrus fruits grown in temperate regions throughout the world. In the United States, lemon trees are grown in only three states: California, Arizona and Florida. Lemon trees are more sensitive to the cold than orange trees. According to Purdue University, temperatures below 24 degrees F can defoliate lemon trees.
Prepare the planting area for the lemon trees approximately two weeks in advance. Turn the soil 10 to 12 inches deep and remove any rocks or other objects that could interfere with the growth of the lemon trees. Choose a sunny location that can offer the lemon trees some protection from the elements. Texas A&M University recommends planting lemon trees on the south or southeast side of a house.
Remove the lemon trees from their growing containers. To do this, lay the container on the ground on its side, being careful to not damage the tree. Using a stout block of wood or a hammer, tap along the base of the container (near the drain holes) until the container starts to loosen. Slide the container off the root ball of the lemon tree.
Dig a planting hole for each lemon tree that is the same depth as the root ball, and 1 1/2 times its width. Space the planting holes 20 to 25 feet apart.
Wash approximately 1 inch of the growing medium from the root ball of each lemon tree. This will help to ensure good root-to-soil contact, and the lemon trees will become established quicker.
Set a lemon tree into a planting hole. Do not plant the lemon tree too deep in the planting hole. Make sure the top of the root ball is sitting level with the surrounding soil.
Fill the planting hole about 1/2 full of soil. Then, pour water into the planting hole until it's about 2/3 full. Fill the remainder of the planting hole with soil after that water has all drained away.
Create an 18 to 20 inch circular berm of dirt (using soil from another area in your garden to build up the berm, rather than digging a trench around the tree) that is 3 to 4 inches high. Then, pour water into the berm, letting it fill up slowly. Water the lemon trees every three to four days for the first two weeks after planting, then once every 7 to 10 days for the next two to three months.