Rhododendron (Yakushimanum) 'BARBARELLA'

Rhododendron (Yakushimanum)
Rhododendron (Yakushimanum) 'BARBARELLA'
rhododendron
SIZE/TYPE medium-sized shrub
USUAL HEIGHT 0.5-0.8m
USUAL WIDTH 0.8-1.3m
LEAVES evergreen broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS kombinovaná:deep pink a cream a yellow
BLOOMING TIME May - May
LOCATION full to partial sun
USDA zone (lowest) 6   (down to -23°C)
WINTER PROTECTION  
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Rhododendrons, azaleas, and mountain laurels
Evergreen broadleaf
náhled fotonáhled foto
Yakushimanum rhododendrons were first discovered in early 1900’s on a small island off southern coasts of Japan called Yaku. They grew happily on rocky slopes of this mountainous island in full sun, and were constantly disturbed by wind. Their habit was compact and not very tall. All these features seemed very promising and deserved better examination. The first plants were sent to the UK by a Japanese grower Koichiro Wada in 1934, which set off a long programme of hybridizing brand new, fantastic plants.

Barbarella is a stunning yaku-rhodo variety bred by Holger Hachmann, son of the famous rhododendron breeder from Germany Hans Hachmann. It has the following rhodo groups involved in breeding: repens, yakushimanum, viscidifolium, and also wardii which helped with yellow tones. The bell-shaped flowers are rich pink at margins, and light yellow in the throat which can NEVER be described as orange even though some sources mention this colour. They open in the first decade of May and bloom for about 3 weeks. The evergreen leaves are quite thin, very dark green, quite flat with no curving, broadly elliptic and glossy, and almost invisible when the plant is in full bloom. 10-year-old plants reach only about 30 cm tall and about twice as much wide making a neat and compact dome.

Tests proved that deadheading of these hybrids does not influence formation of flower buds for the following season. However, as these plants are slow growers, making short new branches, deadheading significantly improves their appearance since the new shoots cannot cover the unsightly dry seed-pods that followed the flowers.

Yakushimanum rhododendrons grow slowly, forming compact mounds. Their mature leaves usually have indumentum of various colours on the undersides. They thrive in full sun and partial shade, they can take full shade, too, but is not ideal. The soil has to be reasonably fertile, well-drained, cool, constantly moist, and of low pH (6 or less) = acidic. They do not require nitrogen but need iron and phosphorus. Their roots spread outwards and are very shallow, therefore never plant them too deep. When planting mix good, lime-free compost with quality peat or leaf mould, and add some slow-release fertilizer. To conserve moisture and to suppress weeds keep them mulched all year round. Barbarella is rated hardy to about -24°C (USDA zone 6) and may survive a little bit more yet it has not been tested in colder winters.

Last update: 19-08-2015
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GLOSSARY
  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
  • HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
  • FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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