Diane, I was mistaken in my explanation of the BA treatment of Zantedeschia bulbs. In the research paper I cited, the bulbs were dipped 6 times during 3 months of storage. Sorry for the error. Mark Robertson Everett, WA USDA hardiness zone 8a, Sunset climate zone 4. > On Sep 7, 2019, at 8:26 PM, Garak <garak@code-garak.de> wrote: > > Hi Diane, > > it COULD be just the storage alone - I dig up my Zantedeschias every winter and store them dry in the basement - round about 9°C - and I've never had any trouble getting them to flower as long as they get adequate light in summer. I guess leaving them in the ground in BC in winter deprives them of the drought stress they get in winters in South-African summer rain climate. Maybe the GA3 s(t)imulates a natural process happening when the plant gets dry? > > Am 08.09.2019 um 00:37 schrieb Diane: >> Thank you for the explanation, Mark. >> >> So, the bulbs would need to be dug up every year in order to be treated. I wonder if the parental species are some that require fires before they bloom in the wild. >> >> Diane >> >> _______________________________________________ >> pbs mailing list >> pbs@lists.pacificbulbsociety.net >> http://lists.pacificbulbsociety.net/cgi-bin/… > > > -- > Martin > ---------------------------------------------- > Southern Germany > Likely zone 7a > > _______________________________________________ > pbs mailing list > pbs@lists.pacificbulbsociety.net > http://lists.pacificbulbsociety.net/cgi-bin/… Mark Robertson, Ph.D. 916-342-5616 _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…