I live in Wisconsin zone 4, and I'm looking to find any info on wintering chameleon plants that I float on top of my pond, in baskets with a little clay soil. They look and do awesome on top of water in their baskets and can't become invasive as many people have said they do. Does anybody know, What the best way to winter these is or would be. Do I need to bring them in and purchase a grow light ? I don't want to replace them yearly, if I can somehow keep them, Thank You for any info. It's going to freeze tonight or tomr so I need to do something today.