Dead tops on young maple trees
I am in the heart of Oklahoma. I planted 2 new maple trees in 2005 and they did okay in 2006 and 2007. But last year the tops of them died. Last year was not excessively rainy nor hot. Just a nice summer.
I waited until growing season this year to see what would happen. The tops remain dead, but the bottom half has new leaves. These 2 trees are in sandy (not fertile) soil, so each growing season I have put in a fertilizer stick in the ground near their trunk.
I wonder what caused the tops to die in the first place? And should I leave the tops as they are or cut off the dead limbs? At this point these trees are about 10 feet tall. They gained decent height each growing season.
Thanks for any advice,
dbteeitup