Japanese Maples - Acer palmatum
Acer palmatum in Spring
While the delicate beauty and splendid colors of Japanese Maples have delighted Western gardeners for almost two centuries, they have been revered in the East for over thirteen centuries. Native to Japan, China and Korea these trees do best in light shade and do not like to be dried out. Plant them in soil that has a fairly high content of organic matter and is moist, but well drained. Older, established plants can take some drought. Full sun and winds may burn the leaves, especially the variegated varieties. Most Japanese maples are hardy to Zone 5.
- Acer palmatum var. atropurpureum (aka ‘Atropurpureum’) – Reddish purple 5-7 lobed leaves, especially in spring, which fades in the summer heat but shows excellent spring and fall color. Seedlings produced from a good selection will show all varieties of coloration. May grow 30-40’ in height.
- Acer palmatum ‘Butterfly’ - One of the older, but still popular, garden tested variegated forms with emerging leaves green with pink margins, maturing to gray green with cream-colored variegation. Fall color is rose-red to purple-red. Habit is upright, vase shaped 12-15’ high by 6-8’ wide, relatively slow growing.
- Acer palmatum ‘Fireglow’ – This plant keeps a good red color all season long. The fall color is particularly showy. It has a very upright growth habit and has bronzy red stems.
- Acer palmatum ‘Glowing Embers’ – This is a Michael Dirr selection, exceedingly vigorous with small dark green leaves that turn orange-red-purple in fall. It’s a fast growing, heat tolerant plant, often growing to 30’.
- Acer palmatum ‘Karasugawa’ – The most outstanding feature of this cultivar is its bright pink new growth. Some leaves are almost entirely white with pink edges while others are mostly pink with tiny flecks of white or bright green. As the season matures, the leaves get greener but still retain some pinks and whites. This is not a vigorous grower and it is somewhat tender. The plant rarely grows higher than 6-9’.
- Acer palmatum ‘Katsura’ – This is a dwarf form with leaves that emerge a soft yellow orange with deeper orange margins. As the season progresses the leaves turn a rich green and then bright yellow or orange in fall. It grows to about 5 feet tall at maturity. This variety makes a good bonsai.
- Acer palmatum ‘Okushimo’ – An upright vase shaped tree that may grow to 24’ or more at maturity. Its leaves are an unusual shape, deeply lobed and almost tube shaped. The fall color is an intense gold.
- Acer palmatum ‘Oregon Sunset’ – This plant exhibits a good rounded habit and has leaves that emerge very red in spring. As the season progresses, the leaves fade to a bronzy red then turn a fiery red in fall.
- Acer palmatum ‘Oshi Beni’ – The new growth emerges a vibrant orange-red to red, but loses this color in late spring, becoming bronze to greenish red. Fall color is rich scarlet. The plant will grow 15-20’ and develops a spreading habit.
- Acer palmatum ‘Red Pygmy’ – This is one of the cultivars of linearilobum group, with red or bright maroon leaves that are 7 lobed with long strap-like divisions. This tree grows about to 6’ by 6’. This is an excellent cultivar for a very small garden. The new growth is not always typical, so do not prune out unusual growth as it reverts to normal during its second season.
- Acer palmatum ‘Sango Kaku’ – A common cultivar praised for the brilliant coral fall and winter color of the young stems. The color is very striking, but is lost as the bark matures. New leaves are tinged reddish but turn a light green for the summer. Fall color is gold with some reddish tints. The tree will grow 20-25’ high by 18-22’ feet wide. It is not as heat tolerant as some other cultivars.
- Acer palmatum ‘Trompenburg’ – The leaves are deeply cut creating a lacy look. The foliage is deep purple and persists into summer then it changes to a reddish green. Fall color is red to crimson. The plant grows 13-16’ high by 10-13’ wide.
- Acer palmatum ‘Versicolor’ – This is one of the most popular cultivars that will grow up to 25’ on 25 to 40 years. Leaves are deep green in color with a varied pattern of markings of colors of white and occasionally pink.
- Acer palmatum var. dissectum – Cut-leaf Maple. The most refined of all maples with leaves of 7, 9 or 11 lobes cut to the point of attachment of each lobe and each lobe is finely toothed. Seedlings exhibit a variety of variation. Plant may only grow 10-12’ tall by 20’ wide. Old specimens have a remarkable branching structure that cascades.
- Acer palmatum var. dissectum ‘Red Feather’ – A dwarf plant with extremely lacy, small, fine leaves. The leaves emerge in spring with a reddish color that fades during the summer. Fall color is a beautiful crimson red.
- Acer palmatum var. dissectum atropurpureum “Inaba Shidare’ – (leaves of rice plant) On outstanding dissectum form with lobes up to 10 cm long. The leaves emerge a deep purple red and retain this color all season. Fall color is a brilliant purple red or crimson red.
- Acer palmatum var. dissectum ‘Seiryu’ – The only upright form of the dissectum group. The foliage is bright green, which turns strong gold in the fall with reddish tints. Plants may grow up to 20 feet in height.
- Acer palmatum var. dissectum ‘Viridis’ – This is a catch all term for all green leaf dissected types. Fall color is yellow gold to red. The plant may grow as large and wide as the straight species.
- Acer palmatum var. dissectum ‘Waterfall’ – This beautiful selection with extremely cascading branches is considered the best of the green leaf dissected forms. The foliage is a rich green all summer long and turns gold with reddish undertones in fall. This cultivar was discovered as a chance seedling at Willowwood Arboretum. The original plant is by the pond near the house.
Acer palmatum in Fall