Acer shirasawanum 'AUREUM' Shirasawa maple, Japanese maple
size/type
small tree,small tree
usual height
2-4m
leaves
deciduous broadleaf
colour of leaves
flowers
insignificant or non-blooming
location
semi-shade / partial sun
soil type
acidic (peaty)
soil moisture requirements
evenly moist (dislikes drought)
USDA zone (lowest)
5b (down to -27°C)
winter protection
for zone 5+6
for zone 7
categorized
Japanese maples are the créme de la créme of every garden. They are compact, dense shrubs or majestic looking small trees. Every garden can have one without a need for simulating Japanese garden style. Currently, there are numerous varieties in the market but we prefer to stick with the old-time favourites that proved to do well in our climate.
Description of the plant:
“Aureum” is variety that differs from others by its more or less erect growth with horizontal lateral branches. The fan-shaped leaves are fresh yellow-green to golden yellow, sometimes with pinkish margins. The other difference is fruit: Acer shirasawanum holds its samaras above the foliage, while on acer palmatum they (at least eventually) hang down.It grows medium slowly, a mature tree can reach 4m in many decades. We recommend planting it in semi-shade or filtered sun as it tends to get sunburnt in full sunlight. If you, however, wish to plant it in full sun make sure the roots are mulched with a thick layer of bark and provide extra watering in summer. It needs light, acidic, well drained soil that will retain moisture. If you feel you need to feed it, use balanced, slow-release fertilizers only.
It can be trimmed or shaped, the best time to do so is from May until June, or end July for bonsai makers. My feeling is that it is best to leave it with no pruning at all so it can show its irregular growth which makes each one an unrepeatable original. Plants older than 3-5 years (wood maturity pending) are fully hardy to about -26°C (USDA zone 6).
Last update 20-12-2007
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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.
