If you give them lots of sun they will EXPLODE. We went on vacation last
summer and when we came back 2 weeks later the whole pond was chock full
of them. However, with little sun I find they grow much much slower.

John Bachman wrote:
We have two water hyacinths in our new pond and they seem to be doing
well. They have doubled in size and appear healthy but have not
bloomed yet. Will they propagate? If so, how?

TIA

John