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Grand Prix Rhododendron

Rhododendron catawbiense 'Grand Prix'

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Grand Prix Rhododendron (Rhododendron catawbiense 'Grand Prix') at Westwood Gardens

Grand Prix Rhododendron in bloom

Grand Prix Rhododendron in bloom

(Photo courtesy of NetPS Plant Finder)

Height:  5 feet

Spread:  5 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  5a

Other Names:  Catawba Rhododendron

Description:

A superb broadleaf evergreen showcase shrub with soft lavender-pink flowers in spring and a compact rounded habit, quite hardy, good in partial shade; absolutely must have well-drained, highly acidic and organic soil, use plenty of peat moss when planting

Ornamental Features

Grand Prix Rhododendron is blanketed in stunning clusters of rose trumpet-shaped flowers with white centers at the ends of the branches in mid spring, which emerge from distinctive purple flower buds. It has green foliage. The large narrow leaves remain green throughout the winter. The fruit is not ornamentally significant.

Landscape Attributes

Grand Prix Rhododendron is a multi-stemmed evergreen shrub with a more or less rounded form. 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.

Grand Prix Rhododendron is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • General Garden Use

Planting & Growing

Grand Prix Rhododendron will grow to be about 5 feet tall at maturity, with a spread of 5 feet. It tends to be a little leggy, with a typical clearance of 1 foot from the ground, and is suitable for planting under power lines. It grows at a slow rate, and under ideal conditions can be expected to live for 40 years or more.

This shrub does best in full sun to partial shade. It requires an evenly moist well-drained soil for optimal growth, but will die in standing water. It is very fussy about its soil conditions and must have rich, acidic soils to ensure success, and is subject to chlorosis (yellowing) of the leaves in alkaline 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 selection of a native North American species.

 
 
Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Characteristics
Accent  Massing  Garden 
Applications
Flowers  Winter Value 
Ornamental Features