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Round-Leaved Rhododendron

Rhododendron orbiculare

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Round-Leaved Rhododendron (Rhododendron orbiculare) at Lakeshore Garden Centres

Round-Leaved Rhododendron flowers

Round-Leaved Rhododendron flowers

(Photo courtesy of NetPS Plant Finder)

Height:  15 feet

Spread:  15 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  7b

Other Names:  Rhododendron rotundifolium

Description:

An unusual variety with rounded, blue-green leaves, producing stunning hot pink to rose pink flowers in spring; outstanding as a garden accent; absolutely must have well-drained, highly acidic and organic soil, use plenty of peat moss when planting

Ornamental Features

Round-Leaved Rhododendron is covered in stunning clusters of lightly-scented pink bell-shaped flowers with violet overtones at the ends of the branches in mid spring. It has bluish-green foliage with silvery blue undersides. The round leaves remain bluish-green throughout the winter.

Landscape Attributes

Round-Leaved Rhododendron is an open multi-stemmed evergreen 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.

Round-Leaved Rhododendron is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • General Garden Use

Planting & Growing

Round-Leaved Rhododendron will grow to be about 15 feet tall at maturity, with a spread of 15 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. 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 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 foliage 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 species is not originally from North America.

This plant is not reliably hardy in our region, and certain restrictions may apply; contact the store for more information.

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