Tough little critters, lol. I'm amazed that they survive planted in the ground at the botanical gardens - we have a rainy season in mid summer and in winter, which seems like it would kill them to me, but.... some flowers from last November, I believe. (Please ignore the gasteria (?) in the background, and the fuzziness!)
I should go back and check on them now, maybe get new pics and see if they've made it through the heat wave.