Depending on the plants, the form of weed killer and the circumstances to which it is being used, the length of time herbicides need to function can differ. They typically take 2 to 4 weeks to totally rid your garden of the undesirable plants. ...
Weed Killer: Spreaders help you with weed control. Apply the best pre-emergent herbicides in early spring and early fall to prevent summer and winter weeds. And apply the best post-emergent herbicides anytime you want to kill existing weeds. Fungicide: You can treat common lawn diseases with ...