Hi Jane and Rob, Rob's growing conditions in Tasmania are probably the most comparable with your own. Complicating the information that Rob has given, is the very wide distribution of this species in the semi arid and arid interior of the Eastern states of Australia down into the southern part of South Australia a span of over 1,500 miles. in the northern parts of the distribution rainfall is heavy in summer, driest in winter , while in the southern part of its distribution it faces winter rain and very dry summers. Populations of this species have generally adapted to these conditions - so that the NSW Calostemma's tend to go dormant during early spring and then are revived and flower once a substantial mid-summer rain storm occurs. In South Australia, they will go dormant early in early or late spring (soon after ground moisture dries up) - and they usually wait until the first late summer storms or autumn rainfall before they flower- and autumn flowering is the most typical flowering period. In my own collection I also have found Calostemma purpureum from South Australian to be the quickest to go into dormancy in dry weather. As Rob mentioned its usually hot and dry soil conditions that initiate hibernation, and hot wet conditions after a rest period that initiate the flowering cycle. In your conditions they appear to have missed the spring and summer heat triggers. In the Australian outback in Spring and Summer it becomes really hot and dry - 30+ for at least 4 months, and these conditions would be most approximated in some regions of Texas and California. To optimise flowering I think it would be best to stop watering them in mid spring, allow the pots to have some direct sunlight during summer and allow watering by natural rainfall or restart watering in the last month of summer. Calostemma luteum on the other hand is much more associated with the flood plains of the interior of Eastern Australia, and grows more commonly in fertile clay flats. It is even more responsive to rainfall in breaking its dry dormancy periods - and it typically flowers in mid to late autumn and in early spring ( April, May and September). Good Calostemming Cheers Jim Lykos Blue Mountains Australia Zone 9b