Italian cypress trees (Cupressus sempervirens) are narrow evergreen trees that grow to 70 feet in height. Well-drained soil, lots of sunshine and low humidity are generally all this tree demands. Horticulturists at the University of Minnesota suggest that if growth rate and color appear normal, evergreens don't require fertilizer. If the Italian cypress is being grown in less-than-ideal conditions, though, fertilize it annually. Italian cypress are hardy to USDA Hardiness Zones 7 to 11 and should be fertilized in the spring.
Rake the area around the base of the Italian cypress tree to a 3 foot radius. Remove any debris or weeds.
Scatter 10-8-6 granular fertilizer around the raked area. Use 1 pound of fertilizer per inch of diameter of the Italian cypress tree's trunk.
Lightly rake the fertilizer into the top 1/2 inch of soil.
Water the fertilized area until the soil is moist to a depth of 8 inches.