Hydrangea Care & Maintenance
PREPARING FOR PLANTING:
See our GOOD PLANTING GUIDE for guidance on how to properly prepare to plant.
- Plant in a part shaded position.
- Protect from hot afternoon sun and wind.
- Mulch around plant to protect the water catchment area.
- Add some compost for extra nutrition.
- Keep soil moist in summer.
- Avoid spraying flowers.
- Water every day when planted in pots.
Hydrangea Obsidian 'Whhite Knight'- (image courtesy Plants Managemnet Australia)
SOIL & pH:
- Hydrangea colour depends on the variety and type.
- pH of the soil helps keep this colour.
- Blues prefer Acidic soil - Add Bluing powder twice yearly to help.
- Reds prefer Alkaline soil - Add lime twice a year.
- Whites are not affected by soil type.
- Prune after flowering.
- Late summer is best - don't leave to winter.
- Prune the whole plant to maintain the round form.
- Prune Paniculata later to get autumn flowering.
- Fertilise after trimmimg and in spring.
PEST & DISEASE:
- Hydrangeas are quite hardy and relatively tolerant to pest and disease.
- Watch out for Aphis or Mites, black spot or powdery mildew.
- Treat as required.
- Keep pot in a light position out of direct sunlight.
- Water regularly.
- After flowering, cut back and plant in the garden.
- Hydrangea make stunning cuts flowers.
- Help to make them last….
- Fill a container with boiling water.
- Trim stems.
- Push flowers through a plastic bag so stems are protruding & flowers are protected in the bag.
- Sit stems in boiling water for a few hours.
- Revive flowers in cold water
For more information: