false hydrangea do they grow new aerial roots

New York, NY

I had to resurface an area where my japanese hydrangea was growing. What happens with their aerial roots? Do they grow new ones? Should I tie it up against the wood and hope it reattaches? Or am I looking at tying it and waiting for new growth?

thx

Lee's Summit, MO(Zone 6a)

The old roots will wither and fall off. Yes, it will grow new ones, and you will need to tie it up until the new ones appear.

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