Fruit trees generally do not need fertilization unless their growth is stunted with a growth rate of less than 8 inches per year, according to Iowa State University. If your fruit trees need fertilizing, Texas A&M recommends a 21-0-0 fertilizer for soils with a pH of above 7, or a 15-5-10 fertilizer if the pH is below 7. Apply in the spring.
About this Author
Josh Duvauchelle is an editor and journalist with more than 10 years' experience. His work has appeared in various magazines, including "Honolulu Magazine," which has more paid subscribers than any other magazine in Hawaii. He graduated with honors from Trinity Western University, holding a Bachelor of Arts in professional communications, and earned a certificate in applied leadership and public affairs from the Laurentian Leadership Centre.