![]() ![]() We’ve just hit the highlights of the most common pest issues here. ![]() ![]() Monterey sells pint-, quart-, and gallon-sized containers of Bt insecticide concentrate that are available from Arbico Organics. The worms are the larval stage of the adult moths, aka rosy maple moths. ![]() Green-Striped Maple Wormsĭryocampa rubicunda feeds on a few different types of tree, but maples are its favorite host. If pruning dead wood doesn’t save an infested tree, it’s best to remove and destroy the entire specimen to prevent further spread. Pyrethroid insecticide applications can work as a preventative measure, and permethrin formulations can be applied in February, a month before the beetles usually show up to bore into trees. Suffering from the combined damage of all these issues, infested plants often die. The beetles bore into trunks, feed on sapwood and heartwood, and vector fungal pathogens. Their presence is indicated by wilting leaves and toothpick-like woody trunk protrusions. Asian Ambrosia BeetlesĪlso known as the granulate ambrosia beetle, Xylosandrus crassiusculus shows up in early spring to attack deciduous trees with thin bark such as Japanese weeping maples. Read more about managing aphid infestations in our guide. Monterey sells horticultural oil in ready-to-spray and concentrate that are available at Arbico Organics. This plant owes the “Japanese” part of its common moniker to the way it was heavily cultivated by the Japanese people for centuries. dissectum hails from China, Japan, and Korea. Cultivation and Historyīest grown in USDA Hardiness Zones 5 to 8, A. I’ve generalized these details for a reason, though – with all of the natural variations and different cultivars out there, one all-encompassing description is difficult to provide if not impossible.īut a weeping habit and finely-dissected leaves are common features that all maples of this variety share. palmatum ranging in height from 15 to 25 feet.īoth the standard species and this variety possess a spread that is typically equal to or greater than their width. dissectum has an average height of eight to 10 feet so it’s a bit shorter than a standard Japanese maple, with a typical A. The end result is lace-like foliage that sways a bit more gracefully in the wind than standard Japanese maple foliage.įor these reasons, this variety is also commonly referred to as threadleaf, cutleaf, or laceleaf Japanese maple.Ī. dissectum also has dissected leaves with seven to eleven lobes each.Įach lobe is jagged, feathery, and finely cut down to its point of attachment, or node. When it comes to growing Japanese maples in zone 6 gardens, their care is much the same as other areas, and being deciduous, they go dormant over winter so no extra care is needed.Along with this weeping form, A. Koto-no-ito – 6 to 9 feet (2 to 2.5 m.), its leaves form three long, thin lobes that emerge slightly red in spring, turn green in summer, then turn bright yellow in the fall.Īs you can see, there is no shortage of suitable Japanese maple varieties for zone 6 regions. Its leaves are green in the summer and dazzling red in the fall. Seiryu – 10 to 12 feet (3 to 3.5 m.) high, this tree follows a spreading growth habit closer to an American maple. It tolerates heat very well.Īureum – 20 feet (6 m.) tall, this large tree has yellow leaves all through the summer that become edged with red in the fall. Hogyoku – 15 feet (4.5 m.) tall, its green leaves turn bright orange in the fall. Shindeshojo – 10 to 12 feet (3 to 3.5 m.), this tree’s small leaves go from pink in the spring to green/pink in the summer to bright red in the fall.Ĭoonara Pygmy – 8 feet (2.5 m.) tall, this tree’s leaves emerge pink in spring, fade to green, then burst into orange in the fall. Inaba-shidare – Reaching 6 to 8 feet (2 to 2.5 m.) tall and usually a little wider, this tree’s delicate leaves are deep red in the summer and shocking red in the fall.Īka Shigitatsu Sawa – 7 to 9 feet (2 to 2.5 m.) tall, this tree’s leaves are a medley of red and green in the summer and bright red in the fall. Its large, layered leaves stay green through spring and summer then change to purple and red in the fall. Mikawa Yatsubusa – A dwarf tree that reaches only 3 to 4 feet (1 m.) in height. Its delicate leaves are green through spring and summer but turn stunning shades of red and yellow in the fall. Waterfall – A short tree at 6 to 8 feet (2 to 2.5 m.), this Japanese maple gets its name from the domed, cascading shape of its branches. Here are some of the best zone 6 Japanese maples: Keep reading to learn more about cold-hardy Japanese maples and the best Japanese maple varieties for zone 6. They’re also relatively cold hardy and most varieties will thrive in cold weather. Then when the fall does come, their leaves become even more vibrant. They tend to stay relatively small, and their summer color is something usually only seen in the fall. Japanese maples are outstanding specimen trees. ![]()
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