Troubleshooting
Hydrangea 'Endless Summer' problems — and how to fix them
Hydrangea 'Endless Summer' (Hydrangea macrophylla 'Endless Summer') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Wilting in heat
The large leaves lose water fast in sun and wind. Site with afternoon shade, mulch, and water deeply during hot spells.
Few or no flowers
Usually too much shade, drought stress, or pruning at the wrong time. As a rebloomer it forgives some old-wood loss, but feed and water for best bloom.
Unwanted flower colour
Colour reflects soil pH and aluminium. Apply ericaceous feed or aluminium sulphate for blue, lime for pink; expect a gradual shift over seasons.
Leaf scorch and powdery mildew
Crisp brown margins from sun and dry wind; white mildew in humid, crowded conditions. Improve siting, moisture and airflow.
Prevent hydrangea 'endless summer' problems before they start
Most hydrangea 'endless summer' issues are care-mismatch, not bad luck. Dial in the basics:
- Common hydrangea problems — the species this cultivar belongs to
- Common hydrangea 'endless summer' problems — our other guide for the same plant
- What's wrong with my plant? — the diagnosis apps compared
- Hydrangea 'Endless Summer' watering schedule
- Hydrangea 'Endless Summer' light requirements
- Best soil mix for hydrangea 'endless summer'
- Hydrangea 'Endless Summer' temperature & humidity
- Full hydrangea 'endless summer' care guide
Looking for hydrangea 'endless summer' in general rather than its problems? Read the full hydrangea 'endless summer' care guide — light, water, soil and feeding.
Hydrangea 'Endless Summer' problems — FAQ
Why is my hydrangea 'endless summer' wilting in heat?
The large leaves lose water fast in sun and wind. Site with afternoon shade, mulch, and water deeply during hot spells.
Why is my hydrangea 'endless summer' few or no flowers?
Usually too much shade, drought stress, or pruning at the wrong time. As a rebloomer it forgives some old-wood loss, but feed and water for best bloom.
Why is my hydrangea 'endless summer' unwanted flower colour?
Colour reflects soil pH and aluminium. Apply ericaceous feed or aluminium sulphate for blue, lime for pink; expect a gradual shift over seasons.
Why is my hydrangea 'endless summer' leaf scorch and powdery mildew?
Crisp brown margins from sun and dry wind; white mildew in humid, crowded conditions. Improve siting, moisture and airflow.