Leroy from Topeka, Ks writes
Yes, the active ingredient in Tordon RTU Specialty Herbicide is known to leach into the soil from treated roots and can remain for several years. Untreated trees/plants can occasionally be affected by root uptake of herbicide through movement into the the topsoil or by excretion of the product from the roots of nearby treated trees. Do not apply Tordon RTU within the root zone of desireables unless such injury can be tolerated.
Answer last updated on: 10/17/2019