Thanks for the reply Ross. The YI are growing quite rapidly now and this year could be a nice one for blooms. It's ironic you mention Pickerel weed. I just purchased some plants to start in our pond. It's good to know the YI and PW can coexist. The plan is to get the water lilies, YI, pond weed and the PW to healthy condition. I'm still pondering the use of some softball or larger limestone on the downwind edge of the pond to deter the vermin muskrats and to further stabilize the pond bank that seems to be the most prone to soil washing. Sounds like you have quite a lake-- 80 acres sounds HUGE!