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!

Answer from NGA
September 22, 2000


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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