Cypress trees grow very quickly and can live hundreds of years. Depending upon the species, the cypress can be either evergreen shrubs or trees, and are grown in the home landscape as windbreaks, privacy screens and ornamentals. A very easy to care for plant, the cypress will grow in a variety of soil textures from sand to clay, provided the soil is kept moist. Most cypress trees are hardy to USDA zones 6 to 10.
Make sure that your cypress tree receives sun all day.
Perform a soil pH test. The cypress tree requires acidic soil, so you may need to add amendments to the soil around the tree. Take a soil sample to your county cooperative extension office for an analysis and then follow the agent's instructions as to what amendments to use and how to apply them. You may be instructed to add sphagnum peat moss, sulfur or lime to correct the pH of the soil. This is accomplished by adding the material to the soil around the base of the tree and scratching it into the soil.
Fertilize the cypress tree with fish emulsion, according to the rate recommended on the package for the size of your tree. Spread the fertilizer evenly over the root zone, which could extend up to three times the width of the branches of the tree. Water immediately after applying the fish emulsion to the soil. Fish emulsion will not harm the trunk of the tree but keep it away from the leaves.
Watering the cypress tree depends upon the type of cypress tree you are growing. The bald cypress, for instance, is a swamp tree and thrives on wet, flooded soil. Other cypress trees will require watering only once every two weeks. Over-watering is detrimental to these trees. Your county cooperative extension office can recommend a watering cycle for your particular cypress species.
Prune the cypress tree in early spring to keep it in the desired shape. Remove dead or dying branches at any time during the year.