K26kv from Kelso, Wa writes
I ask this because I spot sprayed some thislte in a different part of our yard about three weeks ago. When I went to pull the dead plants the roots seemed to still look pretty healthy. I am planning to spray our pasture in late summer/early fall because the fields are to hilly and wet-slippery in the spring to drive the tow behind sprayer around.
Crossbow Herbicide is a post emergent herbicide that does kill down to the roots. However on some hard-to-control weeds such as thistle, it may require mutlitple applications to fully kill the weed off.
Answer last updated on: 06/27/2018
