Our first couple of years they did not do so well, the last two years they have gone nuts. I wonder if the pond being more established helps? We tried the water lettuce and it just seems to burn here, and the raccoons seem to like it a lot too. The raccoons seem to like the Water Hyacinth too but they did not get into it too much last year. When I shut the pond down last fall I had a good 6 to 8 garbage cans full. I put as much into the composter but had to through the rest away. Once the house is renovated I plan on making a large compost bin up at the side of my house. The Water Hyacinth breaks down just lovely over winter, I never want to have to throw one out again.