Astilbe Not Flowering - Knowledgebase Question

Winona, MN
Question by cbambnen
February 16, 2000
My 3 year old astilbe didn't flower last year. It gets a.m. and some p.m. sun and then maple tree shade. Does it need more light hours?


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Answer from NGA
February 16, 2000

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Astilbe prefers full sun to part shade and thrives in rich, moist, cool soils. The clumps should be divided every 4-5 years (but I'll tell you from personal experience that you may need to use an axe to get through the rootmass!).

If yours isn't flowering, it's obviously unhappy. You might want to dig and divide, replanting in well-amended soil, in a slightly sunnier spot. Be sure to water regularly during the growing season.

Hope your astilbe rebounds and provides lots of bright plumes this year!

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