Rhododendron (impeditum) 'SAINT MERRYN'

Rhododendron (impeditum)
Rhododendron (impeditum) 'SAINT MERRYN'
dwarf rhododendron
SIZE/TYPE small shrub
USUAL HEIGHT 0.5-0.8m
USUAL WIDTH 0.5-1m
LEAVES evergreen broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS +různobarevné:lilac a violet
BLOOMING TIME May
LOCATION full to partial sun
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 foto
Impeditum is a dwarf, mounding rhododendron species from China which is often hybridized to achieve different flower colours and leaf types. It is very hardy and durable and withstands full sun. It is a popular plant even among gardeners who are not fond of fancy large-flowered hybrid rhododendrons. Saint Merryn is an English variety bred by Major-General Eric G.W.W. Harrison (1893-1987) from Cornwall and introduced in 1970.

Saint Merryn is a dwarf rhododendron renowned especially for its attractive foliage covering the plant all year round. The evergreen leaves are small, elliptic, deep olive green, glossy, and fragrant when crushed. In early May open abt. 3 cm wide, violet-pink flowers in profusion. It slowly forms mounding so somewhat dome-shaped shrubs with tiered branches in maturity.

As a sun-tolerant species it can be placed in a large rockery or a border with other sun-loving ericaceous plants like heather and deciduous azaleas. It is a perfect ground cover under tall trees and a low companion for compositions with large shrubs. Unless you are making a bonsai do not prune it. Any form or trimming or shearing should be done immediately after flowering. Old plants can be rejuvenated by hard pruning in early spring (before flowering).

Grow this dwarf type in any location from full sun to full shade, just make sure it is always well mulched. The roots are shallow, spreading to sides in search for nutrients. Never plant it too deep. The soil has to be acidic (pH 4.5-5.5), rich in humus, cool, always moist but well-drained (no clay). Ideal soil mixture is peat with lime-free, light garden soil topped with leaf mould. Fully hardy to min. -27°C (USDA zone 5b), possibly more.

Last update 27-01-2021
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Rhododendron (impeditum)
Rhododendron impeditum
Rhododendron (impeditum)
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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