AUTUMN HYDRANGEA CARE

Collage of different types of hydrangeas

For gardeners in the Northern hemisphere, we are coming into the home stretch for considering autumn hydrangea care. Where I garden in US Zone 5b, we are almost out of time by mid-August. But if you garden where it is warmer, you have a few more weeks. Here’s what to keep in mind.

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Hydrangea Leaf Spots

Leaf spots on hydrangea

On my recent garden visits, I’ve noted an abundance of unsightly foliage and hydrangea leaf spots. They can be bacterial leaf spot from an infection by Xanthomonas campestris, or Cercospora which grows from the pathogen Cercospora hydrangeae. I’m also seeing powdery mildew on many plants. You can thank Erysiphe friesii var. friesii (formerly Microsphaera friesii).…

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