Posted: Mon Mar 22, 2010 2:03 pm
As far as I know I've always just gotten "Water Hyacinth" and "Water Lettuce". I didn't know there were different varieties.
I would say go for the cheapest, or if they're all the same price, get the type that is fastest growing (some varieties might say "Very prolific" or something like that). If they're otherwise all the same, just get the one that looks the best to you.
Ralpheal, "The 'L' is silent."
Frankie, "Young at heart."