Lovely, Daisy! They hate root disturbance, which may explain why it sulked for a while.
Presumably it gets some moisture through the summer, perhaps from things you've been watering nearby?
(I am trying to grow some from seed; they germinated quite well this year, and though they have grown enough to crowd their 5-inch seed pot and cry out for transplanting, I'm not going to do that till they go dormant. They are in a very light/loose compost, which I hope will let me disentangle their roots without too much damage.)