Ashley from Hoquiam, Washington writes
Couple days? 3 weeks? If longer the better, then to how long? What if they're not active? Verses active?
If you are planning on cutting down the target plants, it would be best to trim and then to apply Crossbow to the fresh cuts. This will help with faster absorption and kill of the target plants. Actively growing plants will metabolize herbicides much more quickly; applying to dormant plants will provide minimal results.
Answer last updated on: 07/03/2015