nutsaboutnature wrote: Glad your Lobelia Cardinalis came back and are blooming! Lobelia grow naturally next to streams and can take a lot of water.
Mine are growing in an area that frequently has standing water when the snow starts melting, but the ground is still frozen. In fact, that bed has been under several inches of water on multiple occasions in early spring and the plants that have thrived are my Lobelia, Aquilegia (Columbine) and Astilbe.
I leave my Lobelia stalks standing all winter to let the seeds drop. I also think it helps prevent root rot. I've also read the info about keeping leaves off the rosettes, but I don't always get all the leaves off and have never had a problem.