Rhododendron stenopetalum 'SCHÖNBRUNN'

Rhododendron stenopetalum
Rhododendron stenopetalum 'SCHÖNBRUNN'
spider azalea
SIZE/TYPE medium-sized shrub
USUAL HEIGHT 0.5-1m
USUAL WIDTH 0.8-1.5m
LEAVES semi-deciduous broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS pink
BLOOMING TIME April - May
LOCATION semi-shade / 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
Rarities
náhled fotonáhled fotonáhled foto
Rhododendron stenopetalum is a rare evergreen to semi-deciduous azalea with thin flower petals and leaves thanks to which it is called spider azalea. It is native to Japanese islands Honshu and Shikoku. In horticultural world only one variety was known - Linearifolium. Its sport was found in the gardens of Schönbrunn Castle in Wien, Austria, and was named after the castle.

Schönbrunn is a unique and beautiful semi-deciduous azalea. The flower petals are extremely narrow just like its linear, ribbon-like leaves. They are mid green, matte, and remain evergreen through mild winters. After cold winters they dry out and are replaced with new foliage after flowering. Annual growth is only about 15-20 cm and the shrub exhibits a low, spreading habit. Thanks to delicate flowers and fine foliage it looks fluffy and exotic. Blooming begins in late April and continues until mid May, however, in semi-shaded location the flowering period may double.

Semi-deciduous azaleas are ericaceous plants which, just like their Japanese sisters, prefer semi-shaded position sheltered from the hottest midday sun, and constantly moist soil. During temporary summer dry spells in certain areas their leaves may suffer and be prone to fungus infections. When spots appear on the leaves or they lose colour and start to curl use a suitable fungicide immediately. 1-2 sprays should help the plant remain beautiful and healthy. They require no pruning. Should you need to shape or rejuvenate your plant do so as early in the spring as possible so that it can still make new twigs with flower buds for the next season. It re-sprouts reliably. It has many surface roots which spread to sides in search for nutrients and water. The best soil mixture consists of peat, lime-free compost and leaf-mould. This azalea has not been tested in all possible conditions but so far has proved hardy to -24°C (USDA zone 6).

Last update 02-04-2019
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Rhododendron canadense
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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