I bought a water lily for my small pond, and it keeps growing new flowers, and the old ones die off in a few days. I am on my 3rd flower now. The new leaves come in, and stay in. Yet the flowers grow to the top of the water, poke out, then thrive for a few days. Then the flower closes, and the stem tilts down under water, where you can't even see the flower any more. What gives? It's like some kind of cycle of new flowers or something. Even now it seems I have a new baby flower coming up to replace this newest one. I want all the flowers to stay! that would look really great in my opinion. Anyone happen to know why my flowers are doing this?