Q.What Could Cause Dead Grass Beneath Rose of Sharon?
The lawn beneath my rose of sharon has died. Not even weeds are growing beneath it. What could be the cause? Will this spread to the rest of the lawn? Should I leave it and mulch or do I have to do something?
Try a thick spray of nematodes. Water them in well, then apply a horse, turkey and molasses compost. Water well and watch it come to life.
Depending on the age and size of your rose of Sharon, the grass underneath probably has too much shade and not enough nutrients to grow correctly. In my opinion, I would lay sections of newspaper over the area to be mulched, overlapping, and mulch 4-6''. The newspapers will smother weeds and the rest of the grass, and it is biodegradable.