Azalea japonica 'KÖNIGSTEIN'

Azalea japonica
Azalea japonica 'KÖNIGSTEIN'
Japanese azalea
SIZE/TYPE low or groundcovering
USUAL HEIGHT 0.4-0.8m
USUAL WIDTH 1-1.3m
LEAVES evergreen broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS purple red
BLOOMING TIME May - May
LOCATION full to partial sun
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
Japanese azaleas are very popular features of our gardens. In their home climate they grow to relatively substantial shrubs, as opposed to limited sizes in our continental, dry climate. They are very floriferous, maintenance-free shrubs that usually bloom from mid to late spring.

Königstein is an old fortress near Dresden, Germany, as well as a name for this Japanese azalea. It was bred at Pillnitzer castle gardens, close to Königstein fortress. It is a slow and dense growing plant with profusion of large, 3-4 cm across, widely open, purple-violet flowers with a darker blotch just like rhododendrons have. Leaves are small, elliptic to oval, mid green in summer changing to coppery red from autumn until spring. They are reliably evergreen. Königstein azalea flowers in May and grows about 50 cm tall and 80 cm wide in 10 years.

Japanese azaleas can be clipped to shapes in early June. If so, do not use fertilizers enhancing growth rate. The size of new branches would get out hand and spoil the shape you are going to achieve. They need light, permeable soil that is acid, constantly moist (keep azaleas mulched at all times) and moderately fertile. Use fertilizers for rhododendrons and azaleas, or ericaceous plants. The best soil mix is 1/3 of peat, 1/3 of leaf-mould or lime-free compost, and 1/3 of soil from the hole where you are going to plant it. Azaleas have shallow roots, so do not plant not too deep. Fully hardy to -26°C (USDA zone 5b).

Last update 08-01-2010; 24-02-2016
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Azalea japonica
Azalea japonica
Azalea japonica
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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