Hello Leo, im not so sure about International environments, but here in Australia in the wild, virtually all callostemma do grow from about 8" to 16' deep, it is correct that in these environments & depths, even in hot summer, the bulb stays cool... In some places they sit in a permanent moist zone & others are in soil that completely bakes dry.. However they virtually all receive summer rains in the wild & in most cases these rains build up to heavy rain in late summer which triggers the flowering cycle.. I have them growing in a hot dry environment, only planted to a depth of 6 to 8' deep & they are quite happy.. Mine dry out naturally in winter to spring when hot dry westerly winds dry everything out & its impossible to get moisture into the ground.. I hope this little bit of info helps with your experiments :) Steven Queensland Australia On 28 August 2014 23:39, desertdenial <desertdenial@hotmail.com> wrote: > When I put mine in the ground last year after 1-2 years in a pot they > immediately sent up inflorescences. > > Marie Ortiz > Tolleson, Az > > > Sent from my T-Mobile 4G LTE Device > > -------- Original message -------- > From: "Leo A. Martin" <leo@possi.org> > Date: 08/04/2014 9:47 AM (GMT-07:00) > To: pbs@lists.ibiblio.org > Subject: [pbs] Calostemma purpureum > > > > This spring I moved my plants to a spot where they get bright shade with > some very late > afternoon sun, and watered regularly all summer. They remained in leaf and > even made a > few new leaves. One of the plants just yesterday began pushing two > inflorescences. > > The Wiki says plants should be allowed to dry after leaves yellow. Perhaps > those in very > warm-summer climates, or those growing their plants in containers, should > experiment > with watering all summer, and deeper containers. > > Leo Martin > Phoenix Arizona USA > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > _______________________________________________ > > > -- > Steven : ) Esk Queensland Australia Summer Zone 5 Winter Zone 10