Judy, I repot every two to three years and in between, as Jane does, I top off the soil mix and keep up on fertilizer. I find that regular mixes designed for pots tend to break down after 2-3 years and don't hold water as well. My troughs with rock garden plants which have a much more fast-draining mix can go longer, but even then it's possible to go too long, so every 4-5 years I rake back the gravel top dressing and add more potting mix or change it as after that period of time, weed seeds are on overload from surrounding areas. Robin Hansen Pleasant 70 F in Coquille, OR _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>