The Q&A Archives: White pine tree

Question: I planted a white pine tree in june and just in the past month the tree has been losing needles.The rest of the neddles have turned a yellowish green color instead of blue green. My neighbors white pines are Big and beautiful do you know what the problem is?

Answer: I would first check for insect populations. Spider mites like dry, dusty locations such as you would find on the inner branches of needled evergreens. Take a piece of white paper, hold it beneath an inner branch and tap sharply on the branch. Debris should fall onto the paper. If you see little specks and they move, your tree is hosting a population of spider mites. There are miticides you can spray to rid your tree of these pests. To keep them from taking up residence in your conifers, simply hose the plants off every couple of weeks during the summer months. If you don't find insect pests, the problem is most likely water stress. Landscape trees and shrubs need one inch of water per week, applied slowly so it can trickle down and wet the entire root mass. I dig basins beneath my shrubs and young trees, fill the basin with water, allow to drain, then fill a second time. Once a week is all it takes.

Hope this helps and your tree recovers!

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