Blackening leaves on new hydrangea

Hello. I am in Toronto, in a house. A month ago I had 16 incredibal hydrangea planted on my front gardens, which get partial shade. I have watered them carefully – although I was told not to overwater them. The…

Watering Perennial Shrubs in Fall

Hello my rain barrels are still active and will be disconnected by 30 Oct 2019….is it wise to continue watering perennial shrubs like weigela, rose of sharon and swamp mallow until the first hard frost…thanks for your response…