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Kullervo Rhododendron
Rhododendron 'Kullervo'
Height: 3 feet
Spread: 3 feet
Sunlight:
Hardiness Zone: 4b
Other Names: Finnish Rhododendron
Group/Class: Marjatta Hybrids
Description:
Ideal for small gardens, this variety matures at only three feet; the blooms are initially pink but progress to white and young leaves are covered in down; perfect for foundation planting; must have well drained, highly acidic and organic soil
Ornamental Features
Kullervo Rhododendron is covered in stunning clusters of lightly-scented pink trumpet-shaped flowers with white overtones and a gold blotch at the ends of the branches in mid spring. It has green evergreen foliage. The narrow leaves remain green throughout the winter.
Landscape Attributes
Kullervo 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.
Kullervo Rhododendron is recommended for the following landscape applications;
- Mass Planting
- General Garden Use
- Container Planting
Planting & Growing
Kullervo Rhododendron 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 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 particular variety is an interspecific hybrid.
Kullervo Rhododendron makes a fine choice for the outdoor landscape, but it is also well-suited for use in outdoor pots and containers. With its upright habit of growth, it is best suited for use as a 'thriller' in the 'spiller-thriller-filler' container combination; plant it near the center of the pot, surrounded by smaller plants and those that spill over the edges. It is even sizeable enough that it can be grown alone in a suitable container. Note that when grown in a container, it may not perform exactly as indicated on the tag - this is to be expected. Also note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.
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