I enjoy reading about sedums...have a similar situation...have been observing the sedums I have. Knowing they are drought tolerant, before I do not water them often. This year I decided to step up watering this summer, like twice a week during summer especially if I know we are going to hit 90F and above, and I see a marked improvement on their growth. Well, I guess not only on my sedums but with other succulents I have..so now I have to re-think that aspect of watering. For sure I will have to scale back watering as temps go cooler....its been too dry here too...I guess our micro climates are such. Before I would water them heavily once every 2 weeks, in summer and much less when it is cold season.