Why are pine tree needles turning yellow?
Most probable cause is the variety is not adapted to high alkaline soil. Could also be other cultural problems such as lack of water, lack of sunlight, compacted soil. 14. Q: What is causing inside needles of a pine tree to turn brown? A: This is probably natural leaf drop if coming from the center of the tree or natural shading from the outside needles. 15. Q: When do you fertilize trees and with what? A: Newly planted and younger trees should not be fertilized at planting as it can damage new roots. If soil test shows need, use liquid fertilizer; however, entire area should have fertility corrected before planting begins. Established trees in yards that are doing well do not need extra feeding. They receive adequate fertilization as lawns are fertilized using a 3-1-2 ratio fertilizer. Lush, fast growth is not strong growth. Any heavy feeding should be in late winter for spring and summer growth; no special summer or fall feeding. So many symptoms of poor growth are cultural problems
