Oxydendrum arboreum

Oxydendrum arboreum
Oxydendrum arboreum 
sourwood, sorrel tree
SIZE/TYPE taller shrub
USUAL HEIGHT 5-8m
USUAL WIDTH 2-4m
LEAVES deciduous broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS white
BLOOMING TIME July - August
LOCATION full to partial sun
USDA zone (lowest) 5   (down to -29°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 Deciduous broadleaf
Rarities
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Sourwood is a rare species from North America. It looks like a fairy-tale tree as if stolen from an animated fantasy movie because it does not resemble any other plant commonly grown here. It is a slow growing small tree or a large shrub with a narrowly pyramidal growth when young, and spreading a little with age.

Its deciduous leaves are elliptic to lanceolate, glossy and rich green in summer, turning brilliant red and even purple in autumn. In summer it produces abundance of urn-shaped, lily-of-the-valley-like flowers formed in 20-25 cm long pendent racemes. The flowering can last for as long as 4 weeks with bees and bumble-bees harvesting its nectar. Sourwood honey is a specialty in North America and it does not taste sour like the rest of the plant.

If you like unusual and rare plants find this gorgeousness a nice spot in your garden. Look twice or even three times before planting it as it does not like transplanting. Once you have found it, put it in there and do not move it ever. It will make about 5-8m tall and half as wide. In the wild it commonly gets much bigger.

Grow it in full sun or only a little shade in very acid, moist but well-drained, humus-rich soil. It is not good for wind-exposed and boggy sites. Pruning can be done in early spring after frost. Fully hardy to about -29°C (USDA zone 5).

Last update 29-11-2011
SIZES and PRICES
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Oxydendrum arboreum height 60-80 cm
STANDARD
SPRING 2024
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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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