Diadem mountain hydrangea
Hydrangea serrata 'Diadem'
RHS AGM 1999
USDA zones6 to 9
SunHandles full sun to partial sun
WaterHandles moderate to moist soil
Sizeup to 3 feet tallup to 3 feet wide
- Growth rate
- Moderate
- Habit
- Clumping
- Bloom season
- Summer
- Soil types
- Sand, loam, clay
- Soil pH
- Acid, neutral
Garden uses
Attracts
Notes
'Diadem' mountain hydrangea (Hydrangea serrata 'Diadem') is a shrub for borders, containers, and cottage gardens. It is hardy to USDA zone 6, or down to -10°F (-23°C). This plant likes full or part sun and average to moist, sandy, loamy, or clay soil. It blooms from early to late summer. Bees visit the flowers. It stays about 36 inches tall and wide, so it fits small spaces.
Pairs well with Beni-Maiko Japanese maple, Wide Brim hosta, and Japanese forest grass.