Thanks for the help. As soon as the lily pads start to grow, I'll hit em hard and heavy in that one section. Everywhere else I'll leave em be.
Don't get in a big hurry. If you treat too early ("as soon as the lily pads start to grow"), the plants aren't overly receptive to the herbicide's mode of action. Plus, there will likely be more plants in the same area whose pads haven't yet reached the surface (and will be unaffected by the initial topical treatment).
June/July is as early as I'd suggest for your first treatment. It will likely take two treatments the first year (in the same areas) to keep the plants in check - and maybe less in subsequent years.
