this report seems to cover the required temperature fluctuations, for Crocus sativus growth and flower initiation, in some detail. http://saffroncenter.ir/User_Files/grrenhouse.pdf/ Peter (UK) On 3 March 2014 21:34, Peter Taggart <petersirises@gmail.com> wrote: > that is the point of my questions David. I suspect it is something you > could influence. > Peter (UK) > > > > > On 3 March 2014 21:15, David Pilling <pbs@pilling.demon.co.uk> wrote: > >> Hi, >> >> Put it this way, when I buy Crocus sativus corms from Holland every >> year, is it a foregone conclusion they won't flower, or is flowering >> (that first year) something I can have an effect on? >> >>