Water Gardening: How fast does water hyacinth multiply?, 1 by AlanaG

AlanaG wrote:
Hello! In April I made my first water garden; it's still a work in progress but it holds water and the fish and plants are happy so I like it. Over the weekend I added two water hyacinth to give the fish a little more shade and to help keep the algae down. The guy at the water garden store said that two would be more than enough as they multiply quickly. I was wondering if anyone in the Massachusetts, zone 5b area, has experience with how quickly they multiply? I can't wait to see the top of the pond covered in vegetation!

Also, it might be a coincidence but I had my first frog visitor after the hyacinth was added.