Plant Division - Knowledgebase Question

Madison, WI
Question by elbriggs4
September 22, 2000
My astilbe are getting rather large but I do not know exactly how or when to divide them. Do I cut the foliage back before I start and how large a piece should they be divided into.
Thank you!


Image
Answer from NGA
September 22, 2000

0

Divide astilbe just as new growth begins in the spring. Amend the planting holes with compost and perhaps a slow-release fertilizer. Astilbe does best if divided every 3-4 years. It should spread fairly quickly, so you can start with small divisions.

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