Hydrangea Tree Not Growing Taller: Cultivar Limit or Winter Dieback

Why Height Is Stalled

• Cultivar limit: Some bigleaf hydrangeas max at 3.5 ft; others reach 6 ft.
• Winter dieback: In northern zones, cold kills back stems annually, preventing height gain.

Encouraging Height

• Thin after flowering: remove oldest stems at base.
• Maintain current care.
• Watch for scale insects.

Realistic Expectation

In Chicago, winter dieback likely limits height regardless of cultivar.