Ah, another pretty plant we can't grow in my area of southern California. This one is nonetheless offered by local nurseries but, if anyone in these parts has been successful treating them as anything other than an annual, I'm unaware of it.
I planted a bunch more astilbes last year, including some purple ones. I hope they look as nice as yours.
I have a few astilbes in my garden ... your images make me anxious to find more at local igc's to add to my garden! Great to connect with you on Facebook / Twitter.
This is a nice plant. It looks similar to Astilbe 'Purple Visions' which I love. I never really used Astilbe a whole lot until about eight years ago or so. It is a beautiful addition for shade and does very well when you mass it in larger clumps. Another nice one is 'Sprite' which is a little different from the rest and blooms for a long time.