Rhododendron 'GRAZIELLA'

Rhododendron
Rhododendron  'GRAZIELLA'
rhododendron (Ponticum group)
SIZE/TYPE medium-sized shrub
USUAL HEIGHT 0.6-1m
USUAL WIDTH 1-1.5m
LEAVES evergreen broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS +multicolored:lilac and pink
BLOOMING TIME May - June
LOCATION full to partial sun
SOIL TYPE acidic (peaty)
SOIL MOISTURE REQUIREMENTS evenly moist but well-drained
USDA zone (lowest) 5b   (down to -27°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.

Rhododendrons from the Ponticum group (Pontus = Black Sea) originate from southwestern Europe, Great Britain, the Caucasus, and Western Asia, and preserved fossils prove their even wider distribution before The Last Glacial Maximum (abt. 20,000 years ago). In modern history we find the first record of its cultivation for ornamental purposes in 1763 in Britain. They are commonly recognized by narrow leaves and spreading habit. The botanical species forms abundant suckers which allow formation of colonies often endangering original flora. Therefore, it is now considered an invasive species in many countries of its native habitat. Fortunately, most varieties that fall into this group do not have 100% of the species’ genes as they were crossbred with other species, so we needn’t about their invasion in our gardens.

Graziella is a unique variety that, outside its flowering period, looks like anything but a rhododendron as its leaves resemble oleanders or another exotic plant. They are evergreen, narrowly elongated with a prominent tip, leathery, dark green, glossy, strong and healthy. Graziella is an early bloomer and if the spring is nice and warm it can start blooming already from late April and continue until the second decade of May. The flowers are bell-shaped, bright lilac-pink, opening from deep pink buds. It is a hybrid of Black Sea (r. ponticum) and Tibetan (r. roxieanum) species and was bred by Hans Hachmann in 1992. It grows rather slowly into a beautiful, dense, dome-shaped, evergreen shrub about one meter high and about one and a half meters wide. Despite its exotic appearance, it is very hardy and durable.

For a better-looking plant deadhead where possible. The roots are shallow, spreading to sides in search for nutrients. Never plant them too deep. The soil must 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 leaf-mould. It is hardy to min. -27°C (USDA zone 5b).

Last update 02-05-2008; 15-01-2024
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Rhododendron
Český výpěstek
HOBBY
SPRING 2024
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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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