Rhododendron 'OLIN O. DOBBS' rhododendron
size/type
low or groundcovering,low or groundcovering
usual height
1-2m
usual width
1-2m
leaves
evergreen broadleaf
colour of leaves
flowers
showy
colour of flowers
blooming time
May-June
location
semi-shade to shade
USDA zone (lowest)
5 (down to -29°C)
winter protection
for zone 5+6
for zone 7
categorized
Rhododendron
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.Description of the plant:
Olin O.Dobbs is a rhododendron variety named after its breeder, and I looked everywhere but could not find a single other rhododendron this American citizen hybridized. Could it be a one-hit-wonder? Still, it is a beautiful piece with large, dark purple red flowers decorated with a deep red, almost black blotch on the upper lip, and undulated margins. It is midseason to late and blooms from the second decade of May until about mid June. Evergreen leaves are long, elongated, and nice only if the plant is grown in good soil. Olin O.Dobbs rhododendron is a cross between r. 'Purple Splendour' and r. 'Mars', and forms quite a substantial shrub slightly wider than tall, and prefers dappled shade.For a better looking plant dead-head where possible. The roots are shallow, spreading to sides in search for nutrients. Never plant them too deep. The soil has to 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 leave-mould. It is hardy to min. -29°C (USDA zone 5).
Last update 01-02-2017
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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.
