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Diadem Hydrangea

Hydrangea serrata 'Diadem'

 

Diadem Hydrangea (Hydrangea serrata 'Diadem') at A Very Successful Garden Center

Diadem Hydrangea flowers

Diadem Hydrangea flowers

(Photo courtesy of NetPS Plant Finder)

Height:  3 feet

Spread:  3 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  5b

Other Names:  Mountain Hydrangea

Description:

A lovely, compact hydrangea which features soft pinkish-white lacecap flowers with the sepal edges in deeper pink, fades with age; beautiful and delicate, pale blue flower color in acidic soil

Ornamental Features

Diadem Hydrangea features dainty shell pink lacecap flowers with pink edges at the ends of the branches from mid summer to early fall. The flowers are excellent for cutting. It has green deciduous foliage. The serrated pointy leaves turn an outstanding burgundy in the fall.

Landscape Attributes

Diadem Hydrangea is a multi-stemmed deciduous shrub with an upright spreading habit of growth. Its relatively coarse texture can be used to stand it apart from other landscape plants with finer foliage.

This is a relatively low maintenance shrub, and should only be pruned after flowering to avoid removing any of the current season's flowers. It has no significant negative characteristics.

Diadem Hydrangea is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • General Garden Use

Planting & Growing

Diadem Hydrangea will grow to be about 3 feet tall at maturity, with a spread of 3 feet. It has a low canopy. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 30 years.

This shrub does best in full sun to partial shade. You may want to keep it away from hot, dry locations that receive direct afternoon sun or which get reflected sunlight, such as against the south side of a white wall. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil type, but has a definite preference for acidic soils. It is somewhat tolerant of urban pollution, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This is a selected variety of a species not originally from North America.

 
 
Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Characteristics
Accent  Massing  Garden 
Applications
Flowers  Fall Color  Texture 
Ornamental Features