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What do I do if my hostas are too big?
How do I reduce the size of my hostas?
Hostas have a clumping root system, so to divide a plant, simply cut through the clump with a knife from the crown down. You can also pry apart the root clump with garden tools, but this won't give you as much precision. Cutting through the roots is fine, as hostas roots quickly regrow once transplanted.