I have used cornmeal gluten as a pre-emergent in the nursery with excellent results. It is only effective against seeds, and is most effective with at least 60 percent proteins in it. Also works for ants! On Thu, Nov 5, 2020, 1:32 PM ds429 via pbs <pbs@lists.pacificbulbsociety.net> wrote: > Does anyone have experience with using these products (like Preen) on bulb > gardens. > Dell in Zone 5/6 West Virginia > _______________________________________________ > pbs mailing list > pbs@lists.pacificbulbsociety.net > http://lists.pacificbulbsociety.net/cgi-bin/… > Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net> > _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>