Cut back hydrangeas? No flowers coming back
"Most hydrangeas do bloom only on old wood. That may be why yours is NOT blooming. If it puts out no new growth from the old wood, no flowers will develop. This could be because the flower buds are not entirely hardy in your area.
You may want to try one of the newer reblooming hydrangeas that bloom on new AND old wood. Endless Summer and Forever & Ever Series hydrangeas fall into this category."
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