Smooth Hydrangea — Shrubs
Hydrangea arborescens
Sun or part shade, moderate watering — hardy through cold winters.
- Plant out
- Aug–Oct
- In flower
- Jul, Aug, Sep, Oct
- Sun
- Part sun
- Water
- Medium
- Difficulty
- Demanding
- Hardiness
- H5
- Season
- summer,autumn
- Height
- 50–100 cm
- Spacing
- 100 cm
- Pets
- Toxic to pets
Growing notes
Grows to 0.5-1 metres. Space about 50-100cm apart. In flower Jul-Oct.
Toxic to pets
Smooth hydrangea is a skin allergen: handling it, especially when cutting it back, can give some people a rash, so wear gloves and wash your hands afterwards. Dogs and cats that eat the leaves or flower heads can get vomiting and diarrhoea. If a skin reaction develops, get medical advice; if a pet eats the plant, ring your vet.
→ NHS 111 or your GP for a person with a skin or eye reaction; your vet or the Animal PoisonLine for an animal