Rhododendron canadense 'ALBIFLORUM'

Rhododendron canadense
Rhododendron canadense 'ALBIFLORUM'
Canada rosebay, rhodora
SIZE/TYPE medium-sized shrub
USUAL HEIGHT 0.5-0.8m
USUAL WIDTH 0.5-0.8m
LEAVES deciduous broadleaf
COLOUR OF LEAVES +multicoloured:light green a blue-green
FLOWERS showy
COLOUR OF FLOWERS white
BLOOMING TIME April - May
LOCATION full to partial sun
USDA zone (lowest) 2   (down to -45°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
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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.

Canada rosebay or the rhodora is a deciduous azalea native to Northeastern America where it is found in moist or boggy places. Its classification was uneasy and still in 19th century it was believed not to belong among rhododendrons. Thanks to its native habitat it is renowned for its excellent hardiness down to about -42 °C.

Albiflorum (or Album or even Alba) is a profusely flowering variety of Canada rosebay making small, 5-lobed flowers which do not resemble rhododendrons or azaleas much. They are pure white with white, usually 7 stamens. Once they have wilted leaves begin to appear. They are deciduous, narrowly oval to elliptic, 3-5 cm long, pale green, matt, and look like bog myrtle foliage.

It grows slowly into a bushy, upright shrub about 80 cm tall and wide. To achieve a denser and compact shrub, and to get rid of its peculiar seed capsules, prune it immediately after flowering. If you are making a bog-like setting with plants such as andromeda, myrica, dwarf salix or birch i.e. mostly non- or inconspicuously flowering species, add this rosebay to splash it with flowers and colour in spring.

Canada rosebay prefers locations in full sun and needs constantly moist or wet ground – yes, it can grow in boggy sites along with other bog-loving plants. The roots are shallow, spreading to sides in search for nutrients. Never plant it too deep. The soil must acidic (of pH value 4.5-5.5) and rich in humus. Ideal soil mixture is peat with lime-free, light garden soil topped with leaf-mould. It is hardy to min. -42 °C (USDA zone 2b).

Last update 26-01-2021
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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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