I'm also in Zone 7 (E Tennessee) and I concur with the recommendation of Sarracenia for permanently boggy areas. Mine are completely hardy year-round with the pots set on pavers in a shallow pond so that about the bottom inch of the pot is constantly in the water. When the big ones (S. leucophylla and S. flava) put up their fall pitchers, they get more compliments from visitors than anything else in the yard. If you already have cattails, I would hardly think anything else would seem invasive by comparison. I tried every form of them - dwarf, variegated, "graceful", etc. and every one would be out of the pot and taking over within a few years. Ditto for pickerel weed and a lot of other marginals. Only Sarracenias really stay put in this particular situation. I pot them in pure ground peat with a gravel top layer. For seasonally varying water levels, you might try Siberian iris. They can grow wet or completely dry, and the clump will slowly expand but they don't run and therefore aren't invasive. Bob _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>