Clint from Hampstead, Nh writes
The water is let down on our lake in Oct for winter, exposing all the lake weeds and making them much more accessible...but the weeds have all now gone dormant. Will spraying the weeds now have any effective kill come spring? The lake will fill with water once again come April. Would an application of Rodeo be more advisable in early April before the water rises, or does the weed killer really only work on active growing green plants?
No, Rodeo Herbicide will only kill actively growing weeds and will not stay in the soil until Spring.
Answer last updated on: 11/06/2016
