Leyland cypress trees are tall evergreen shrubs or medium-sized trees that can grow 40 feet tall and 30 feet wide. Their quick growing feature causes them to be commonly used for privacy screens and hedges. Leyland cypress trees are also commonly used as Christmas trees, as they cause less of an allergic reaction than other evergreens, don't shed and are soft, not prickly. This tree requires little maintenance, is drought resistant and is hardy as far north as USDA planting zone 6.
Choose a location that has full sun and drains well. Keep in mind that the tree grows rather tall, so don't plant too close to other trees or gardens that it will shade when fully grown. Plan planting for early to mid-fall.
Dig a hole twice the diameter of the root ball and the same depth. Remove all weeds, grass and stones from the dug-out soil. Amend the soil with compost if the original soil is heavy clay and does not drain well. Use a ratio of 1 part compost to 1 part soil.
Adjust the depth of the hole so that the spot where the roots and trunk meet sits 1 inch above the soil by adding soil to the bottom. Spread the roots with your fingers and place the tree in the planting hole.
Fill halfway up the root ball and water in to settle the soil around the roots. Continue to fill until the soil is level with the surrounding ground. Water again to settle the soil. Fill in to level the soil again after settling. Tamp the soil down by stepping on it all the way around the tree
Water to fill the entire planting hole immediately after planting. Then water to keep the soil moist throughout the fall. Water in winter if the soil is especially dry; the root ball of the cypress should not be allowed to completely dry out.
Place a 3-inch thick layer of shredded mulch around the tree in a 6 foot diameter. Leyland cypress will not compete well with weeds for water and nutrition. Pull any weeds that you see come up through the mulch.