Rhododendron 'SIMSON'

Rhododendron
Rhododendron 'SIMSON'
rhododendron
SIZE/TYPE medium-sized shrub
USUAL HEIGHT 1.5-2m
USUAL WIDTH 1.5-2m
LEAVES evergreen broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS yellow
BLOOMING TIME May - June
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 fotonáhled foto
Rhododendrons are reliable, beautifully flowering, evergreen shrubs of variable origin: S.W. China, Himalayas, Northern America, and even Europe. The original species were hybridized several times for better performance so in the 1950´s there were more than 10,000 cultivars registered, and the number keeps increasing.

Simson rhododendron is a result of multiple hybridization where possibly the key parent was a Chinese wild form r. wardii from S.E. Tibet and N.E. parts of Yunnan province. Further crossing with hardier species and varieties significantly increased hardiness of this variety as well as improved its flower colour. The open bell-shaped flowers are medium to light yellow without a blotch on the upper lip. Evergreen leaves are flat, medium to olive green, and matte. Simson is popular also for its faster growth rate than most yaku hybrids with yellow flowers. It grows at moderate growth rate into quite a symmetrical, almost cushion-like but upright shrub, about 1.2-1.5m tall and wide in 10 years. Bred by Hans Hachmann in 1989.

For a better looking plant dead-head where possible. The roots are shallow, spreading to sides in search for nutrients. Never plant them too deep. The soil has to be acidic (pH 4.5-5.5), rich in humus, cool and always moist. Ideal soil mixture is peat with lime-free, light garden soil topped with leave-mould. Hardy to min. -23°C (USDA zone 6).

Last update 23-11-2017
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Rhododendron 'SIMSON' height 30-40 cm
STANDARD
SPRING 2021 -

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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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