OK, if I were a true sustainable gardener, I wouldn't grow astilbe. They like a lot of water and I don't have anywhere in my garden that I could put them without babying them in that department (lots of trees, too dry).
But I justify it by only having one area where I plant my shade plants that require extra water - having them all in once place also saves on watering time. This garden area also contains hostas, goat's beard, bleeding heart and ferns.
Astilbes come in a variety of heights, flower and leaf colours and bloom times. I don't know what varieites I have because I got them all in a bulk package from Costco a few years ago.
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