Killing Persistent Tree Roots in a Leaky Pipe Area

A small yard with multiple trees (Chinese elms, poplar, palm, cottonwoods, catalpa) had a leaking PVC pipe surrounded by dense fine roots. The elms had resprouted three times after removal attempts.

Herbicide Treatment

Spray new sprouts with glyphosate (Roundup). The herbicide translocates to roots, killing the system. Protect desirable plants—glyphosate kills any green tissue. For precision, wipe sprouts with a glyphosate-soaked cloth (wear gloves).

Persistent Species

Chinese elms and cottonwoods vigorously resprout from roots. Repeated treatment is necessary. Shade and root competition also suppress grass.