Current practice by whom? On Friday, February 5, 2021, 11:52:35 PM EST, Nan Sterman via pbs <pbs@lists.pacificbulbsociety.net> wrote: I can’t comment on the red volcanic sand in particular but don’t incorporate it into your garden soil. You can’t alter native soils permanently, and current practice is to plant into native soils only, without any amendments, regardless of what you are planting. Nan in So Cal > _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>