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Japanese
Maples A thru K Japanese
Maples L thru Z
Japanese
Maples are a widely cultivated family of plants
useful as small trees, large shrubs, container plants, and bonsai. There are many exciting
cultivars that look good in many different situations. Long
recognized for their value in the orient, they are only now being widely appreciated in
the
Culture: Japanese maples are surprisingly easy to grow and maintain. They are
generally winter hardy to about 20 degrees, and grow from Zones 5-9. They can be grown in pots and given
some winter protection in Zones further north. At the other extreme, they can be grown
into frost free zones but here they will not usually display the well known brilliant fall
colors. Container culture can extend their useful range. They are extremely easy to grow
in containers, a practice taken to its most extreme form in the art of bonsai.
Most any garden
soil will grow Japanese maples, but the soil must be well drained! Wet soggy soil
around the roots is a killer. They grow in a wide range of soil pH preferring a slightly
acidic soil.
Japanese maples
grow in sun or shade. In their natural habitat Japanese maples are understory trees,
growing in dappled forest sunlight and at the edges of woodlands. Ideally they prefer to
be grown in similar conditions. Bright sunlight and hot summers do not kill trees, but in
hot summer areas, the newest leaves may burn and scald in these conditions.
Plants should
have a consistent supply of water during the first 2 or 3 years after planting.
Established trees can withstand considerable dry spells and even periods of drought, but
young trees may dry up and die under the same circumstances. A lack of water during the
early years of establishment is the number one killer of young trees. Few pests or
diseases afflict Japanese maples, and no regular spraying or controls are indicated.
For those interested in learning more we recommend-
'Maples of the
World' and 'Maples for Gardens' by D.M. van Gelderen and
co-authors
Gives a European perspective on the Japanese maples. Both are packed with color
photographs.
Japanese Maples'
-Third Edition by J. D.
Vertrees & Peter Gregory
This is the American bible on Japanese Maples. The 3rd edition revised and expanded by
Peter Gregory updates the taxonomy of the earlier editions to currently accepted names and
spelling. Vertrees earlier grouping is abandoned in favor of the grouping shown below
-which also conforms with van Gelderen.
Amoenum Group
Leaf lobes are moderately divided to 2/3rds the way to the leaf base.
Palmate
Group Leaf lobes
are deeply divided 2/3 to 3/4 of the way to the leaf base.
Matsumurae
Group Leaf lobes are very deeply divided more than 3/4 of the way to the
leaf base.
Linearlobum
Group Leaves have long narrow strap-like lobes, divided to the leaf base.
Dissectum
Group Leaf lobes are very deeply divided and deeply dissected into
sublobes.
Dwarf Group
These are the smallest growers
Other Group
Maples who cannot be placed in the above groups.
Note: The cultivars are all grafted. Normally they
are grafted close to the top of the soil line, but most dissectums are grafted between 12" to 24"
high on the root stock to create a small trunk for the weeping branches to descend from.
This reduces the need for staking and creates a larger, fuller plant faster. We also
propagate some low grafted dissectums in particular for use in bonsai. Please specify if
you need low grafted plants.
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