It looks like we managed to spray our herbicide on the lilies about the time they would have died naturally. Hopefully, that means next spring's crop will be slowed up a bit.
It struck me that the permit process is probably an annual deal, with a September 1 expiration. If that's so, we ought to have the city apply for next year's permit as soon as possible. Then, we'll have the whole growing season to attack those things and, maybe, keep the lake free all season.