I highly recommend you stay away from the Nuphars, brandy-bottle, spatterdock, bullhead, or aka cow lilies. Everyone that has had them near me eventually cuss them. They often seem quite good but eventually they start spreading and go out of control. So much for free lilies. Ron, they could easily cover 75%-80% of your pond. Hybrid lilies will not do that nearly as fast or grow as deep as the Nuphars. Spend a little money and do it the better way. Start slow if you are cautious.