[Arid_gardener] Question from Home-Hort WWW page

[gplumb at cox.net]

85022
gplumb at cox.net

I have two African Sumac trees that are extremely heavy with new foliage and seeds.  The last couple of wind storms have broken two large branches, which I have removed.  With monsoon winds on the horizon, I am concerned about more potential damage.

I have contacted two different certified arborists and have conflicting opinions from them on whether now is an appropriate time to thin the canopies of these trees.  One says that summer is not a good time to thin them because this opens the trees up to sun damage.  He recommends thinning between late fall and early spring.  The other says that being native to an arid climate, these trees can be thinned any time of year without fear of sun damage.

Any idea which one of them is correct?