Herbicides. Herbicides such as glyphosate are available to kill the grass, but not harm the tree. The label will indicate if the herbicide is right for the grass you have and whether your particular tree is sensitive to it.

Can you spray Roundup around trees to kill grass?

Roundup is an herbicide designed to clear weeds and grass through spray application. ... In short, Roundup is safe to use around trees so long as it does not come directly into contact with foliage or leaves.

What chemical will kill grass permanently?

A non-selective weed killer, such as Roundup, is a great option for killing weeds and grass permanently. The Glyphosate in Roundup works by infiltrating the plant through the leaves. From there, it attacks all plant systems and kills them completely, including the roots.