I am so jealous of your growing conditions....here where I live I can count on one hand the number of days we get in the 90'sF during our "summer" of parts of July and August. And winter.....well, we can commonly have -30's (and lower) for days at a time from possibly late Nov. until sometimes early March. Last year we got several feet of snow during March and April. Yeah, all of my adeniums will be under lights, probably with supplemental heating, starting sometime in mid Sept.....at least all my seedlings--not quite sure what I'll do with my grafted obesums and larger seedlings.
