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Hydrangea Leaves Browning with Spots in Full Sun

New blue hydrangea on sunny slope — leaves turning brown with dark spots. Blooming well otherwise.

Likely Cause

Thirst! Recently planted + full sun + slope = severe water deficit. Hydrangeas are very thirsty. If water doesn't fix it, apply fungicide labeled for hydrangeas (possible fungal disease).

Wildflowers: Hydrangea Leaf Spots: Likely Cercospora Fungus; New Boxwoods Turning Whitish-Gray: Transplant Stress?; Hydrangea Pruning Guide: Timing by Species; Hydrangea Rust and Spider Mites: Diagnosis and Organic Control; Hydrangea Stem Black Spot on Former Industrial Site; Hydrangea Wilting Daily in Toronto: Heat Stress, Not Disease; Establishing Damianita (Chrysactinia mexicana) in Phoenix: First-Year Care; Reviving Wilting Hydrangea Arrangements: Hammer & Fresh Cut; Indoor Hydrangea Care: Mophead Hydrangeas for Cool, Bright Rooms; Winter Care for Common Hydrangeas in Atlanta: When to Cover and Which Varieties Rebloom

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