Smooth hydrangea (Hydrangea arborescens)
Care, watering, light and tips for Smooth 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 Smooth hydrangea
Hydrangea arborescens, commonly known as smooth hydrangea or 'Annabelle', is a deciduous shrub native to the eastern United States, renowned for its large, rounded white or greenish flower clusters. These blooms appear in summer, creating a stunning visual display in partially shaded gardens or as part of informal hedges. Its robust appearance and abundant flowering make it ideal for woodland edges or as a focal point in flower beds.
Native range
Eastern North America
Care tips
It prefers partial shade, especially in warm climates, though it tolerates some morning sun. The soil should be consistently moist, well-drained, and rich in organic matter; regular watering is crucial, particularly during dry spells. Pruning in spring, before new buds emerge, is beneficial for encouraging abundant flowering and maintaining a compact shape. Avoid intense direct afternoon sun, as it can scorch leaves and wilt flowers.
How to save a dying Smooth hydrangea
- Warning signs
- Drooping, wilted leaves even with moist soil (water stress or heat), overall yellowing.
- First aid
- Move to partial shade, water deeply if soil is dry. If waterlogged, check drainage. Prune spent blooms.
- What kills it
- Too much direct sun and intense heat without enough water. Also heavy soil without good drainage that waterlogs roots.
- Can it be saved?
- Yes, if roots aren't rotted. Act quickly by relocating and adjusting watering. It's quite resilient.