I will say that my Astilbes are pretty carefree except for this past summer. Combination of heat and lack of rain really bothered them this year but I know they'll be back in good shape in the spring. My true die-hards are Epimediums.
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb