low needle density on mature red pine
I have three 10 to 12 inch diamitor red pine on our lake lot the look sick and have low needle density on lower branches and even in the crown, but to a lesser extent. The younger pines look fine. The soil is well drained (gravel) and is quite open with good wind circulation. The other trees look health including all the spruce. Are these trees doomed or is there hope? Some of the needles are brown from the tip half way to the base of the point of attachment to the branch.
Otter Tail County Minnesota