I have a desert willow that has 4″ to 5″ roots just below surface, that has raised my brick driveway. Can I cut them off and bl
ock them from growing that direction?
The answer is probably. If the tree is well balanced and has roots all around the base then one or two being trimmed shouldn't matter. Just make sure the tree is watered if there is a shortage of rain or it may wilt a little in part due to the reduced root volume.