Bigleaf hydrangea (Hydrangea robusta)
Care, watering, light and tips for Bigleaf hydrangea on Floravia.
Quick facts
- Family: Hydrangeaceae
- Difficulty: Moderate care
- Watering: every 3 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Bigleaf hydrangea
Hydrangea robusta, also known as 'cu zhi xiu qiu', is a medium to large deciduous shrub prized for its large white or pink flower clusters that bloom in summer. Its leaves are deep green and slightly serrated, creating lush foliage. It is ideal for hedges, borders, or as a specimen plant in woodland or semi-shaded gardens.
Native range
China and the eastern Himalayas
Care tips
It prefers partial shade or full shade in warm climates, protecting it from direct afternoon sun. It requires rich, well-drained, and consistently moist soil; avoid waterlogging. Water it abundantly during dry periods, especially in summer. A common mistake is planting it in poor or very alkaline soils, which can affect flowering and leaf color.
How to save a dying Bigleaf hydrangea
- Warning signs
- Drooping, wilting leaves even with moist soil; brown, crispy leaf tips; no blooming or dried flowers.
- First aid
- Move to partial shade, water deeply if soil is dry, mist leaves. Check drainage.
- What kills it
- Strong direct sun, lack of water in summer, alkaline soils, constant waterlogging, severe pruning at wrong time.
- Can it be saved?
- Yes! They are very resilient. Act fast for dehydration or heat stress. It can regrow from the base.