Hi Rimmer, Mine start growing shortly after I water them, so just pick your convenient season or conditions and then start watering. I consider them to be sort of opportunistic growers rather than rigid summer- or winter-growers. They probably tolerate a moderate amount of cold, depending on where your stock came from. I think they are normally considered to be summer-growing, and summer or at least spring seems to have finally arrived around here. Regards, Jim Shields At 09:03 AM 5/13/2014, you wrote: when should Ammocharis coranica be watered in spring to bring it into growth? when days are above 70F and nights above 50F? Thanks Rimmer -- James Shields email@example.com P.O. Box 92 Westfield, IN 46074 U.S.A.