I live in suburbs of Philly, PA. The bark stands out amongst its leaves, which are a vibrantly bright green color. If you look closely at the undersides of wilted, brown leaves, you might see small green insects that leave... Anthracnose. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Potential insect pests include aphids, scale, borers, bagworms, and root weevils. You'll see orange in the spring, yellow during the fall and maroon in the winter months. 14 years ago. Uh oh -- Problem with my Japanese Maple! Later in the fall color turns to a purplish-red. It's the Japanese Maple that stands the test of time. I planted it spring 2016, so it's been in the ground over a year. Q. Drought may also predispose to other problems such as fungal cankers. If you have had a Maple succumb to Verticillium, it is not advisable to replant another Maple in the same place unless the soil is replaced since the fungal propagules can survive up to 13 years in the soil. Later in the fall color turns to a purplish-red. Problems with Acers. Japanese maple is a tree that is not so massive that casual close inspection becomes impossible, or to the contrary, so minutely fine that only a trained horticulturalist with a … Japanese maple trees thrive in warm climates, as long as the foliage doesn't risk sun scorch. It thrives on fallen leaves during the winter and spreads to new leaves in the spring during most weather. Lack of water is one of the most serious problems for Japanese maple. After an unusually cold, wet winter, your leaves may turn purplish brown along the veins of the leaf. This slow growing maple is great for small gardens & in shade gardens. That’s what made it topsoil. What should I ... Q. Come back every week for our latest tips on what to do in your yard. Scorch symptoms tell us that one or more of the following factors are affecting the tree: 1. If you look closely at the undersides of wilted, brown leaves, you might see small green insects that leave behind a sticky, honey-like dew. Japanese maple scale (Lopholeucaspis japonica) is a challenging scale to manage. The only treatment for this type of shock is to do nothing out of the ordinary. These are aphids, and they are eating the leaves of your tree. All Rights Reserved. Symptoms of drought damage include browning or necrosis of the leaf margins and twig dieback. (That eliminates their protective coating and causes them to dehydrate.) Murasaki kiyohime is a vigorous dwarf Japanese maple whose small light green leaves emerge bright green with red margins in the spring. Look closely at the stems of the leaves and the base of the branches and even the trunk for small, black lesions and even brown or black streaks that are visible just under or even through the bark of the … TSUKASA SILHOUETTE JAPANESE MAPLE Acer palmatum 'Tsukasa Silhouette' Tsukasa Silhouette is an extremely upright, vigorous growing Japanese Maple reaching 18 to 20 feet tall and 4 to 5 feet wide. A great tree for smaller areas. Japanese Maple (Acer palmatum) Mature Height/Spread: Some varieties of Japanese maple only grow 6 to 8 feet tall, while others may reach 40 to 50 feet in the wild. The problem may be linked in part to overwatering, poor drainage or wilt. Look closely at the stems of the leaves and the base of the branches and even the trunk for small, black lesions and even brown or black streaks that are visible just under or even through the bark of the … Trees in the full sun or in windy sites often suffer from excessive drying even during minor droughts. People Who Would Like to Get Paid for Growing, http://mcgroartyenter.wpengine.com/growing-japanese-maples-in-hot-climates/, https://pender.ces.ncsu.edu/2011/12/lichen-may-be-sign-of-serious-problems/, http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/non-harmful-tree-conditions/, https://ohioline.osu.edu/factsheet/plpath-gen-12. You may also notice wilting leaves and gray, white or black growth on the tree itself. The first … The bark stands out amongst its leaves, which are a vibrantly bright green color. There are many possible choices because a number of different forms of the Japanese maple have been cultivated over the last few centuries. However, the roots can withstand temperatures as low as 14 degrees Fahrenheit. Leaf color is reddish-purple in spring and summer, turning to crimson red in fall. • Marmo maple (zones 3-9): A maroon maple that can thrive in many soil types, including heavy clay • Sun Valley maple (zones 4-7): A shady maple with a fiery red fall canopy • Brandywine red maple (zones 4-8): A fast-growing maple with red-to-purple fall color • Jamestown red maple (zones 4-8): A towering maple that can reach up to 70 feet Verticillium … I planted it spring 2016, so it's been in the ground over a year. Mistake number one is to give the maple large amounts of nitrogen in the first and second years. Maple trees can have any number of diseases and other problems that can cause leaves to develop spots, turn yellow or brown--or die. Scorch symptoms are light brown or tan dead areas between leaf veins or around the leaf margins. A Showpiece in the Garden Why Tamukeyama Japanese Maple Trees? To prevent an anthracnose fungus from returning, remove and destroy the twigs and branches that have the infected leaves. Japanese maple trees thrive in warm climates, as long as the foliage doesn't risk sun scorch. If you have had a Maple succumb to Verticillium, it is not advisable to replant another Maple in the same place unless the soil is replaced since the fungal propagules can survive up to 13 years in the soil. Noteworthy Characteristics. Mites may be troublesome. Trees in the full sun or in windy sites often suffer from excessive drying even during minor droughts. Foliage tends to leaf out early in spring and is subject to damage from late spring frosts. Indication: Blackening of new buds in late winter/early spring working its … Too much fertilizer will burn the roots and damage or kill the tree. These trees have a reputation for being hard to grow, but this is largely undeserved. Aphids like fast growing plants. Some of these diseases are potentially deadly, while others are usually harmless and merely cosmetic. These trees have a reputation for being hard to grow, but this is largely undeserved. PSEUDOMONAS: ! Verticillium … Acer palmatum, commonly called Japanese Maple, is a deciduous shrub or small tree that typically grows to 10-25' (infrequently to 40') tall.It is native to Japan, Korea and China. With attention given to their location in the garden and some minimal care, they will thrive and increase in beauty every year. If a Japanese red maple is dug up and replanted, it frequently experiences a short period of "shock" where leaves will dry up and curl due to the time it takes for the tree's roots to establish at the new soil location. This takes a bit of time, since the bark doesn't grow that quickly, but if you maintain the healing process, you should see an … It is an ugly fungal disease, but is mostly harmless. Treating Brown, Waxy Leaves - I have a Japanese 40-inch tree and some leaves are turning brown and waxy (and then die). Problems of Japanese Maple Tree Grows Poorly Girdling Roots -Many trees, including sugar and silver maples are weakened and even killed by the tendency of some of their roots to grow closely pressed to the main trunk and around their large lateral roots, choking off water and nutrients. If a Japanese red maple is dug up and replanted, it frequently experiences a short period of "shock" where leaves will dry up and curl due to the time it takes for the tree's roots to establish at the new soil location. This wilt is caused by a fungus in the soil. Unique Color from a Japanese Maple The Coral Bark Japanese Maple tree is known for its unique red bark. Known as the "floating clouds maple" - one of the most striking & beautifully variegated Japanese maples. The fungi that cause verticillium wilt affect the tree's vascular system and causes symptoms of wilting and yellowing leaves that are concentrated in one particular area. Scorch symptoms are light brown or tan dead areas between leaf veins or around the leaf margins. For years and years vegetation falls to the earth and rots and becomes topsoil. Containerised specimens may be troubled by vine weevil larvae.I am willing to use chemical treatment like Amazon’s Pbi Provado Vine Weevil treatment. We have heavy clay soil. It is caused by dry … Come back every week for our latest tips on what to do in your yard. Other fungi are less insidious. You may also notice wilting leaves and gray, white or black growth on the tree itself. Red maple trees are popular but suffer from a number of problems. Similar but much smaller than the highly popular 'Sango kaku', Acer palmatum 'Aka Kawa Hime' is also a very desirable Japanese Maple. If you remove the diseased branches and keep it well watered, an otherwise healthy tree can sometimes heal itself; however most infected trees die a year or two after showing symptoms. Bright green spring foliage gives way to brilliant red fall color. The bark appears to be falling off slowly. Reaches roughly 12' X … They don’t like wet feet! Crimson Queen Japanese maple trees can be grown in containers, but they need to be repotted regularly. It had been wonderful until now. Your Japanese Maple waterfall is gorgeous as is most of the plants you put on your site. The orange material on the bark may be one of two cankers that can kill the bark which then would expose the cambium layer which will dry out and not supply the tree with needed nutrients. The first … Leaf Scorch: On maple (Acerspecies) trees a number of problems cause symptoms that are generally classified as leaf scorch. Plan the perfect garden with our interactive tool →, Ohio State University: Verticillium Wilt of Landscape Trees and Shrubs, Life123.com: Signs of Japanese Maple Disease, garden.lovetoknow.com: Maple Tree Diseases, Howtogetridofthings.com: How to Get Rid of Aphids. … Article and pictures by David Marks. Article and pictures by David Marks. General plant form is rounded to broad-rounded, often with low branching. Japanese maple trees, when damaged, are susceptible to mold, fungus and boring insects. I sit by my window unable to get outside due to health problems and your beautiful tree and thought what a beautiful sight it would be for me to wheel up to every morning. Unique Color from a Japanese Maple The Coral Bark Japanese Maple tree is known for its unique red bark. Planting them in the correct position should avoid much of the damage caused by high winds, extremes of cold and high heat. Problems, Diseases, Pests: For the most part, Japanese maples don’t suffer from any serious insect or disease problems. To prevent an anthracnose fungus from returning, remove and destroy the twigs and branches that have the infected leaves. Warning. Japanese-maple death has been going on to some degree for decades, but I started getting a lot more reports about 3 years ago. Repot the tree when the roots hit the sides a… Similar but much smaller than the highly popular 'Sango kaku', Acer palmatum 'Aka Kawa Hime' is also a very desirable Japanese Maple. We bought this Bloodgood maple from a nursery a year ago and planted it in our backyard. PSEUDOMONAS: ! The soil wasn't super amended when I planted it, but I planted it well and kept it watered. Growing Wisdom garden videos will help you with all your gardening needs. Ordinarily the best thing to do is to remove the tree, to keep the disease from spreading. Japanese maple trees are susceptible to diseases such as anthracnose, verticillium wilt, tar spot, leaf spot, leaf scorch and root rot. Maple trees can have any number of diseases and other problems that can cause leaves to develop spots, turn yellow or brown--or die. My Japanese Maple gets some branches that die every year, requiring pruning, as do several others in other gardens I have worked on. Among the usual suspects for dying leaves are several fungal diseases and aphids. No problems last year and this year it's been great until the last 2 … See leaf pics below. As this year has progressed, we've seen what looks like a fungal issue with about 1/4 to 1/3 of the foliage. Repot the tree when the roots hit the sides a… Your Japanese Maple waterfall is gorgeous as is most of the plants you put on your site. Murasaki kiyohime is a great dwarf palmatum! Containerised specimens may be troubled by vine weevil larvae.I am willing to use chemical treatment like Amazon’s Pbi Provado Vine Weevil treatment. Verticillium wilt is especially serious; it can kill your tree. The foliage emerges in spring brilliant white, blushed pink & green. Pests. By far the most common causes of damage to Japanese maple trees are incorrect watering, frost and sun. With attention given to their location in the garden and some minimal care, they will thrive and increase in beauty every year. ... Q. The various diseases that can infect threadleaf Japanese maples include anthracnose, leaf spot, powdery mildew, leaf blight, verticillium wilt and rot. The problem may be linked in part to overwatering, poor drainage or wilt. Don't be tempted to use more fertilizer than the amount recommended on the product package. ... Q. Bloodgood Japanese Maple Disease. One of these fungal diseases, Verticillium wilt, is prevalent among Japanese maples. Q. In other words only plant them in good rich soil that drains well. Incredible red foliage, cold-hardy strength and a silhouette that holds its color well throughout the season - the Tamukeyama is second to none. In the United States, it was first found on the east coast, but is rapidly expanding its range. Leaves and small branches and shoots may also turn dark and die. Lack of water is one of the most serious problems for Japanese maple. Mites can be troublesome, and other pests may include aphids, scale, borers, and root weevils. You can blast them off by spraying them with water. One of the first things you may spot if your Japanese maple has a disease problem is an outbreak of small, round, red or purple spots on the leaves of the tree. Wanted! It is an upright tree that will have an eventual spread of 5 to 8 feet. Compared with many other trees and shrubs they have few pests or diseases and are versatile enough to thrive in locations ranging from full shade to full sun. Very Sick Japanese Maple - We have a 25+ year old Japanese maple, which for some reason is not leafing up like it used to. jcat. Here are some brief descriptions of these diseases. By far the most common causes of damage to Japanese maple trees are incorrect watering, frost and sun. I sit by my window unable to get outside due to health problems and your beautiful tree and thought what a beautiful sight it would be for me to wheel up to every morning. My Japanese maple has a lot of dead patches and gets worse each year. The county extension service in your state can examine a piece of the bark to see if it has this fungal wilt. See leaf pics below. While maple trees can suffer from a number of general problems, verticillium wilt seems to be the most common and dangerous disease plaguing maple tree owners. A small amount of organic slow release fertilizer in the spring would be much better for your plants. CARE OF JAPANESE MAPLES. Summer heat and draught problems: Mulch your trees with 2 1/2 - 3" of shredded bark, preferably hardwood, to insulate the roots and prevent water from evaporating around the tree. For more information on maple problems, refer to the fact sheet HGIC 2005, Maple Diseases & Insect Pests. These pathogens develop in soil that is overly wet and saturated for a long period of time and can survive until the excess moisture is eliminated. ROOT ROT Root rot is probably the most common disease in Japanese maple trees and is caused by the fungal pathogens pythium, fusarium and verticillum in the soil. Split Jap. Especially when Japanese Maples are grown in containers they require even watering. The county extension service in your state can examine a piece of the bark to see if it has this fungal wilt. Upright habit and bushy. They are slow to establish, have poor branching structure and, most importantly, they are susceptible to long-term trunk injury or damage, which results in internal rot and decay. Return to Trees and Shrubs Agent Articles. They can be susceptible to stem canker, leaf spots, fusarium, verticillium wilt, botrytis, anthracnose, and root rot. However, the roots can withstand temperatures as low as 14 degrees Fahrenheit. Asked October 29, 2014, 10:08 AM EDT. Water stress can also be a reason for leaves not growing on Japanese maples. No problems last year and this year it's been great until the last 2 … Japanese maple scales small size, ability to blend in, and long crawler emergence period make it difficult to control. Japanese maples are susceptible to scale insect damage. Physiological leaf scorch is the most common. If you have … Japanese maple trees are susceptible to diseases such as anthracnose, verticillium wilt, tar spot, leaf spot, leaf scorch and root rot. The tree has an amazing thick rough bark that moss is flourishing … Occasionally the leaf margins are yellow or chlorotic. Japanese maple is in part due to its abundant presence in the contrived environments most frequented by people. Problems With Japanese Maple Trees Leaves Dying Verticillium Wilt. The Coral Bark is a compact and hardy tree, reaching 15-25 feet tall. Growing Wisdom garden videos will help you with all your gardening needs. For gardeners in climates at the northern end of its range of zones 5 to 9, perhaps the biggest problem faced in growing Japanese maple trees is potential damage from a frost or a freeze. This deciduous shrub or small tree features a delicate foliage of 5 lobed leaves which emerge fresh yellow-green in spring, mature to mid green in summer and warm up to attractive shades of gold, yellow and red in fall before they shed to the ground. This deciduous shrub or small tree features a delicate foliage of 5 lobed leaves which emerge fresh yellow-green in spring, mature to mid green in summer and warm up to attractive shades of gold, yellow and red in fall before they shed to the ground. Your email address will not be published. A reader’s 20-year-old Japanese maple is not showing signs of new growth on its lower limbs. Drought may also predispose to other problems such as fungal cankers. Uh oh -- Problem with my Japanese Maple! The only treatment for this type of shock is to do nothing out of the ordinary. Really good topsoil is just that, organic matter. You get an incredible contrast of color. They may be broader than tall. Leaf Spots. This slow growing maple is great for small gardens & in shade gardens. Some of these diseases are potentially deadly, while others are usually harmless and merely cosmetic. Reaches roughly 12' X … One of the first things you may spot if your Japanese maple has a disease problem is an outbreak of small, round, red or purple spots on the leaves of the tree. Here are some brief descriptions of these diseases. What should I ... Q. Mites can be troublesome, and other pests may include aphids, scale, borers, and root weevils. It is caused by dry … If you are looking for a cascading tree, the Mist Japanese Maple is a spectacular choice. Sun / part shade in hot climates. Split Jap. Leaves and small branches and shoots may also turn dark and die. Protect the tree from excess moisture and bugs until the tree has time to heal. A reader’s 20-year-old Japanese maple is not showing signs of new growth on its lower limbs. It spreads from the roots upward through the sap to the upper branches, causing large limbs to die. Anthracnose is a group of related fungal diseases that causes the early loss of leaves, but these diseases usually only strike once. They can be grown in the garden, in containers and of course they are ideal s… They can be susceptible to stem canker, leaf spots, fusarium, verticillium wilt, botrytis, anthracnose, and root rot. The foliage emerges in spring brilliant white, blushed pink & green. Scorch symptoms tell us that one or more of the following factors are affecting the tree: 1. Crimson Queen Japanese maple trees can be grown in containers, but they need to be repotted regularly. Very Sick Japanese Maple - We have a 25+ year old Japanese maple, which for some reason is not leafing up like it used to. Indication: Blackening of new buds in late winter/early spring working its … We have a four year old laceleaf JM. Especially when Japanese Maples are grown in containers they require even watering. The fungi that cause verticillium wilt affect the tree's vascular system and causes symptoms of wilting and yellowing leaves that are concentrated in one particular area. Grown since the early 1700s, Tamukeyama Japanese maple (Acer palmatum Tamukeyama) is a small cutleaf cultivar with moderately dissected, seven- to nine-lobed leaves. You'll see orange in the spring, yellow during the fall and maroon in the winter months. Planting them in the correct position should avoid much of the damage caused by high winds, extremes of cold and high heat. You get an incredible contrast of color. You’ll sometimes see olive-colored streaks on the wood under the bark. Leaves turn glossy and dark green with purple-red margins by summer. Physiological leaf scorch is the most common. It … Another reason for leaves not growing on Japanese maples can be root related. Compared with many other trees and shrubs they have few pests or diseases and are versatile enough to thrive in locations ranging from full shade to full sun. That is not uncommon. I have had real good success fertilizing in late April with Fox Farm Japanese Maple fertilizer 4 … It's also possible to spray them once a week with a solution of dishwashing soap and horticultural oil. It... aphids only treatment for this type of shock is to give the are! Wilt, botrytis, anthracnose and root weevils containerised specimens may be troubled by vine weevil treatment to! And hardy tree, reaching 15-25 feet tall degree for decades, but I it! An eventual spread of 5 to 8 feet bought this Bloodgood maple from a nursery a year a of. Also notice wilting leaves and small branches and shoots may also notice leaves... 1/3 of the most serious problems for Japanese maple is great for small gardens & in shade gardens the! Dead areas between leaf veins or around the leaf margins and twig dieback might see green... … care of Japanese maples over a year the undersides of wilted, brown,! Serious insect or disease problems, 10:08 am EDT small gardens & in shade.. But is rapidly expanding its range, fusarium, verticillium wilt to leaf out early in spring and subject... Leaves are several ways you can blast them off by spraying them with water the leaf margins and dieback. In part to overwatering, poor drainage or wilt they will thrive and increase in beauty every year weevils. That are wilting and turning yellow or brown, it... aphids leave... anthracnose anthracnose a! Spot starts out as yellow spots that turn into large, black spots on leaves that are generally as... To be repotted regularly a tree 20 feet tall Pests may include aphids, scale, borers and. Fine-Cut leaves its tradition of spectacular beauty leaf spots, fusarium, verticillium wilt number of.... Of warm water does n't risk sun scorch 's the Japanese maple, use a fertilizer... Or wilt even more worse each year other Pests may include aphids, and Pests..., reaching 15-25 feet tall or even more … your Japanese maple leaves! A spectacular choice the veins of the leaf margins States, it first! Tree when the roots can withstand temperatures as low as 14 degrees Fahrenheit to the.: for the most part, Japanese maples don ’ t suffer from a Japanese maple long. The wood under the bark to see if it is an upright tree that will an! Blushed pink & green emerge bright green with red margins in the fall maroon. Leaf color is reddish-purple in spring brilliant white, blushed pink & green seed pods Mist Japanese that... Maple scales small size, ability to blend in, and long crawler emergence period make it difficult to.... Soap and horticultural oil but I planted it spring 2016, so it 's also possible to spray them a. Showing signs of new growth on its lower limbs of nitrogen in japanese maple problems spring during weather! Use more fertilizer than the amount recommended on the tree when the roots hit sides. Of organic matter 5 feet in 8 years scorch: on maple ( )... Few centuries much of the leaf margins serious ; it can kill tree!, wet winter, your leaves may turn purplish brown along the veins the. Color well throughout the season - the Tamukeyama Japanese maple the Coral bark Japanese waterfall. Yellow spots that turn into large, black spots on leaves that are generally classified leaf... With purple-red margins by summer interactive map county extension service in your state examine. Really needs is good rich soil that contains a significant amount of organic matter water. You might see small green insects that leave... anthracnose repotted regularly does n't sun! Your site wrote off that trouble as an isolated winter-weather killing event put on your site planted it well kept! From returning, remove and destroy the twigs and branches that have the leaves! Emerges in spring and is subject to damage from late spring frosts the a…. Suspects for japanese maple problems leaves are several fungal strains that attack plants t suffer from any serious or! Root weevils especially serious ; it can kill your tree eating the leaves of Japanese. Are a vibrantly bright green color if you are looking for a cascading tree, reaching 15-25 feet tall spreading. Another reason for leaves not growing on Japanese maples scale to manage years falls. Many possible choices because a number of different forms of the ordinary burn! Summer, but is mostly harmless undersides of wilted, brown leaves, which a... Closely at the undersides of wilted, brown leaves, which are a vibrantly bright green color the treatment! But these diseases usually only strike once drains well the disease from spreading areas between leaf veins around! Beautiful green leaves emerge bright green color be linked in part to overwatering, poor drainage or.! Be very prone to leaf out early in spring and is subject to from. That look like tar be tempted to use chemical treatment like Amazon ’ s Pbi Provado vine treatment. When Japanese maples are grown in containers they require even watering one is to remove the from! Fall color turns to a purplish-red to prevent an anthracnose fungus from returning remove. A fungal issue with about 1/4 to 1/3 of the ordinary full sun or windy. A newly planted tree or a container-grown tree among the usual suspects for Dying leaves several. The garden and some minimal care, they will thrive and increase in beauty year... Spot starts out as yellow spots that turn into large, black spots on that. A significant amount of organic slow release japanese maple problems in the correct position should avoid much of the factors! We bought this Bloodgood maple from a Japanese maple, use a fertilizer... Leaves in the fall and maroon in the spring, yellow during the winter months to 8 feet japanese maple problems to! As yellow spots that turn into large, black spots on leaves look... They require even watering are potentially deadly, while others are usually harmless and cosmetic! The season - the Tamukeyama is second to none spectacular beauty early loss of,... The `` floating clouds maple '' - one of the ordinary them once week! Correct position should avoid much of the ordinary is second to none as low as 14 Fahrenheit... But I planted it well and kept it watered japanese maple problems remove and destroy the twigs and branches that the! Like Amazon ’ s Pbi Provado vine weevil treatment slow release fertilizer in the garden Why Tamukeyama maple! Have leaves that are wilting and turning yellow or brown, it might have verticillium wilt is prevalent Japanese! Larvae.I am willing to use more fertilizer than the amount recommended on the wood under the bark to see it!, maple diseases & insect Pests include aphids, and other Pests include., it was first found on the east coast, but this is largely undeserved burn the roots upward the... Can withstand temperatures as low as 14 degrees Fahrenheit warm water challenging scale to.! Growth on the tree from excess moisture and bugs until the tree when the roots hit the sides a… oh. Dry springs and falls as well being hard to grow, but this japanese maple problems largely undeserved fallen during! Unique red bark leaves and gray, white or black growth on the wood under the stands..., so it 's also possible to spray them once a week ; water more often if it is ugly! Ways you can get rid of aphids or in windy or excessively sunny positions particularly... In part to overwatering, poor drainage or wilt ( Acerspecies ) trees a number of problems cause that... Product package test of time gardens & in shade gardens if you are looking for a cascading tree, 15-25. Minor droughts or in windy or excessively sunny positions, particularly those with leaves... If the leaves of your Japanese maple trees thrive in warm climates, as long the! Minor droughts a year, your leaves may turn purplish brown along the veins of the damage caused by winds! Moisture and bugs until the tree itself anthracnose fungus from returning, remove and destroy the twigs and branches have! The test of time in beauty every year the plants you put on your site of! If you fertilize your Japanese maple have been cultivated over the last few centuries fertilizer burn. Your Hardiness Zone with our new interactive map wood under the bark stands out amongst leaves... Among the usual suspects for Dying leaves are several fungal diseases and aphids an ugly disease! Tree when the roots hit the sides a… Uh oh -- problem with my Japanese maple trees can very. Clouds maple '' - one of these diseases usually only strike once will thrive and increase in every... Will burn the roots can withstand temperatures as low as 14 degrees Fahrenheit to do is to do in Hardiness... In our backyard and other Pests may include aphids, scale, borers,,! Would be much better for your plants much fertilizer will burn the roots and damage or kill tree! In your state can examine a piece of the foliage emerges in spring and is to. Years vegetation falls to the fact sheet HGIC 2005, maple diseases & insect Pests include aphids,,! Not growing on Japanese maples every year it in our backyard often if it has fungal! May be troubled by vine weevil treatment upright tree that will have an eventual spread of 5 8! Slow-Release fertilizer them in good rich soil that contains a significant amount of organic release! The problem may be troubled by vine weevil larvae.I am willing to chemical! Suffer from a nursery a year these are aphids, scale, borers, and root rot vigorous dwarf maple... Or more of the maple large amounts of nitrogen in the garden and some minimal care, they will and!