Red dragon Japanese maple tree’s presence commands attention, and its branches like fiery tendrils reaching toward the sky. Each leaf, a masterpiece painted in hues of crimson and scarlet, dances in the gentle breeze, casting a mesmerizing spell upon all who behold it.
During the fall, the Red Dragon undergoes a magnificent transformation as its leaves ignite into a blazing inferno of reds, oranges, and golds. It is a sight to behold and a symphony of color that captivates the senses and ignites the imagination. Even in winter’s grasp, when the world lies cloaked in snow, the tree stands proud as a beacon of hope and resilience amidst the cold.
Characteristics of red dragon Japanese maple tree:
It is a stunning ornamental tree prized for its distinctive characteristics. Here are some of the key features and characteristics of the Red Dragon Japanese Maple:
Foliage:
The most striking feature is its deeply dissected foliage, which emerges as a vibrant burgundy-red in spring. Because of their deep-lobed structure, the leaves appear delicate and lacy. As the season progresses, the foliage retains its rich red color, intensifying in cooler temperatures. In fall, the leaves may turn shades of crimson, orange, and gold before dropping.
Growth Habit:
Red Dragon Japanese Maple has a cascading or weeping growth habit, with branches that gracefully arch and cascade downward. It typically forms a mound-shaped canopy, reaching a height of 6 to 8 feet and a spread of 8 to 12 feet over many years. Its low, spreading form makes it an excellent choice for smaller gardens, rockeries, or as a focal point in landscape beds.
Size:
While Red Dragon Japanese Maple is considered a dwarf variety, it can still reach a moderate size over time. It tends to grow slowly, adding only a few inches of growth each year. With proper care and maintenance, it can develop into a compact yet eye-catching specimen tree.
They grow well in environments with full sun to partial shade. However, it thrives when planted in a spot with morning sun and afternoon shade. It favors soil rich in organic materials, drains well, and has a mild acidity. Retaining moisture and controlling soil temperature are two benefits of mulching around the tree.
Landscape Use:
Due to its stunning foliage and graceful form, Red Dragon Japanese Maple is a popular choice for ornamental plantings in gardens, landscapes, and container gardens. It works well as a specimen tree, accent plant, or focal point in mixed- borders. Its low-growing habit makes it suitable for planting near patios, walkways, or water features.
Varieties of red dragon Japanese maple tree:
It is a specific cultivar known for its deeply dissected, burgundy-red foliage and graceful, cascading habit. While ‘Red Dragon’ is one of the most popular and widely recognized varieties of red Japanese Maple, other cultivars have similar characteristics. Here are a few notable varieties:
Bloodgood (Acer palmatum ‘Bloodgood’):
Bloodgood Japanese Maple is renowned for its deep red-purple foliage that turns a brilliant scarlet in the fall. It produces magnificent color throughout the year, though it grows more uprightly than ‘Red Dragon.’
Crimson Queen (Acer palmatum var. dissectum ‘Crimson Queen’):
Crimson Queen Japanese Maple features deeply dissected, crimson-red leaves that hold their color well throughout the growing season. Smaller gardens or landscape focal points greatly benefit from its weeping, cascading appearance.
Inaba Shidare (Acer palmatum var. dissectum ‘Inaba Shidare’):
Often known as Inaba Shidare Japanese Maple. It has deeply-colored foliage that becomes more intense in the winter. Its flowing branches provide the impression of an elegant, weeping silhouette, adding visual interest to any garden or landscape.
Garnet (Acer palmatum var. dissectum ‘Garnet’):
Garnet Japanese Maple is prized for its deep burgundy-red foliage, which holds its color well throughout the summer. Its finely dissected leaves give it a delicate appearance, and its compact size makes it suitable for smaller spaces or container gardening.
Tamukeyama (Acer palmatum var. dissectum ‘Tamukeyama’):
Tamukeyama Japanese Maple features deep red-purple foliage that turns a vibrant crimson in the fall. Its cascading branches form a mound-shaped canopy, adding texture and interest to the landscape.
Emperor I (Acer palmatum ‘Emperor I’):
This Japanese maple tree is distinguished by its vivid red-purple leaf that appears in the spring and retains its hue far into the summer. It’s a great option for adding vertical interest to the landscape because of its strong nature and upright growing habit.
How to grow and maintain red dragon Japanese maple tree:
Growing and caring for a Red Dragon Japanese Maple tree requires attention to specific environmental conditions and regular maintenance to ensure its health and beauty. Here are some guidelines to help you grow and care for your Red Dragon Japanese Maple:
Selecting the Right Location:
Red Dragon Japanese Maples thrive in partial shade to full sun conditions. Choose a location with well-draining soil that is rich in organic matter. Ensure the area protects from harsh winds, especially in colder climates.
Planting:
Dig a hole twice the root ball of your tree and slightly shallower. Gently loosen the roots before planting. Place the tree in the hole, ensuring the root flare (where the trunk meets the roots) is level with the soil surface. Backfill the hole with soil and water thoroughly to settle the soil.
Watering:
Red Dragon Japanese Maples prefer consistently moist soil, especially during their first few years of growth. Water deeply and regularly, especially during hot and dry periods. Avoid overwatering, as this can lead to root rot.
Mulching:
Apply a layer of organic mulch, such as shredded bark or compost, around the base of the tree. Mulch helps retain moisture, suppress weeds, and regulate soil temperature. Keep the mulch a few inches away from the trunk to prevent rotting.
Fertilizing:
Fertilize your tree in the springtime with a balanced, slow-release fertilizer. Steer clear of high-nitrogen fertilizers, as they can promote excessive foliage growth at the expense of color and form.
Pruning:
Minimal pruning is essential for Red Dragon Japanese Maples. Pluck any dead, damaged, or crossing branches in late winter or early spring when the tree is dormant. Prune sparingly to maintain the tree’s natural shape and structure.
Protecting from Pests and Diseases:
Scout for common pests such as aphids, scale insects, and caterpillars. Treat infestations promptly with insecticidal soap or horticultural oil. Red Dragon Japanese Maples are generally resistant to diseases, but proper watering and sanitation practices can help prevent issues such as root rot and leaf spot.
Winter Protection:
In cold regions, shield your Red Dragon Japanese Maple from harsh winter weather by mulching the base of the tree or wrapping the trunk in burlap. Do not use plastic or other non-breathable materials that can retain moisture and cause decay.
Where does the red dragon Japanese maple tree grow best?
The Red Dragon Japanese Maple tree (Acer palmatum var. dissectum ‘Red Dragon’) grows best in temperate regions with mild summers and cool, moist climates. While it can adapt to different conditions, certain factors contribute to its optimal growth and health. Here are some considerations for where Red Dragon Japanese Maple trees grow best:
Sunlight:
Red Dragon Japanese Maple trees desire partial shade to full sun conditions. In areas with hot summers, offering protection from intense afternoon sun can help prevent leaf scorching and maintain the tree’s vibrant foliage color. In cooler climates, they can withstand more sunlight.
Soil:
Well-draining, slightly acidic soil rich in organic matter is ideal for Red Dragon Japanese Maple trees. They prefer soil that retains moisture but does not become waterlogged. Amending the soil with compost or organic matter can help improve its structure and fertility.
Climate:
Red Dragon Japanese Maple trees thrive in temperate climates with moderate temperatures and consistent moisture. They are hardy in USDA Hardiness Zones 5 to 9, where winter temperatures typically do not drop below -20°F (-28.9°C) and summer temperatures are not excessively hot.
Watering:
Adequate water is essential for the health and vigor of Red Dragon Japanese Maple trees, especially during hot and dry periods. They prefer evenly moist soil and may require supplemental watering during periods of drought to prevent stress and dehydration.
Protection from Wind:
Red Dragon, Japanese Maple trees can be sensitive to strong winds capable of damaging their delicate foliage and branches. Planting them in a location sheltered from prevailing winds or providing windbreaks, such as fences or other trees, can help protect them from damage.
Space:
While Red Dragon Japanese Maple trees are relatively compact compared to other ornamental trees, they still require adequate space to spread their branches and fully-develop. Plant them where they have room to grow without being overcrowded by other plants or structures.
How long does the red dragon Japanese maple tree take to grow?
The growth rate of a Red Dragon Japanese Maple tree (Acer palmatum var. dissectum ‘Red Dragon’) varies and depends on several factors, including environmental conditions, soil quality, and cultural practices. Generally, Red Dragon Japanese Maple trees are considered slow to moderate growers.
From a young sapling, a Red Dragon Japanese Maple tree can take several years to reach maturity and full ornamental potential. Here’s a general timeline for the growth of a Red Dragon Japanese Maple:
First Year: During the first year after planting, a Red Dragon Japanese Maple may establish its root system and begin putting on some growth above ground. However, growth during this initial period is typically modest.
Subsequent Years: In the following years, the Red Dragon Japanese Maple tree will gradually grow as it becomes more established. Growth rates can vary, but on average, you can expect the tree to add a few inches of growth each year.
Maturity: It can take 10 to 20 years or more for a Red Dragon Japanese Maple tree to reach to mature, which typically ranges from 6 to 8 feet in height with a similar spread. However, in ideal conditions some specimens may grow slightly larger over time.
Cultural Practices: Providing optimal growing conditions, such as partial shade, well-draining soil, and regular watering, can help promote healthier and more vigorous growth in Red Dragon Japanese Maple trees. Avoiding stressors such as drought, excessive heat, and root disturbance can also contribute to more consistent growth.
Pruning: Pruning should be minimal and focused mainly on removing dead, damaged, or crossing branches to maintain the tree’s natural shape and structure. Excessive pruning can stunt growth and compromise the tree’s health and appearance.
Factors Affecting Growth: The growth rate of a Red Dragon Japanese Maple tree can be influenced by various factors, including sunlight exposure, soil moisture, nutrient availability, and pruning practices. Providing optimal growing conditions, such as partial shade, well-draining soil, and regular watering, can help promote healthier and more vigorous growth.
What is the lifespan of the red dragon Japanese maple tree?
The lifespan of a Red Dragon Japanese Maple tree (Acer palmatum var. dissectum ‘Red Dragon’) can vary depending on environmental conditions, care, and other factors. Generally, Japanese maple trees are known for their longevity, and with proper care, a Red Dragon Japanese Maple can live for several decades or even longer.
In optimal growing conditions and with attentive care, Red Dragon Japanese Maple trees can live for 50 years or more. Some well-maintained specimens can survive over 100 years, particularly in favorable climates and protected locations.
Note that the lifespan of any tree can be influenced by factors such as pests, diseases, weather events, soil quality, and human activities. Ensuring proper watering, fertilization, pruning, and protection from stressors can help prolong the lifespan of a Red Dragon Japanese Maple tree.
How do you propagate red dragon Japanese maple tree seed?
Spreading the Red Dragon Growing Japanese maple trees (Acer palmatum var. dissectum ‘Red Dragon’) from seed can be a gratifying but difficult undertaking since it necessitates persistence and particular circumstances for accomplishment. Here’s a general guide on how to propagate
Red Dragon Japanese Maple tree seeds:
-
Seed Collection:
Collect ripe seeds from a healthy Red Dragon Japanese Maple tree in the fall when they are mature. Look for seeds that have turned brown and have a papery texture.
-
Seed Preparation:
Take out the seeds from the fruit pods and rinse them thoroughly of any pulp or debris. Some growers recommend soaking the seeds in water for a day to soften the seed coat and improve germination.
-
Seed Stratification:
Red Dragon Japanese Maple seeds require a period of cold stratification to break dormancy and stimulate germination. Place the cleaned seeds in a damp paper towel or peat moss, seal them in a plastic bag, and refrigerate them for 90 to 120 days. Check periodically to ensure the seeds remain moist but not water-logged.
-
Seed Sowing:
After the stratification period, sow the seeds in containers filled with a well-draining, sterile seed-starting mix. Plant the seeds about 1/4 inch deep and lightly cover them with soil.
-
Germination:
Place the seed containers in a warm, bright location with indirect sunlight. Keep the soil moist but not waterlogged, as excess moisture can cause rot. Germination can take several weeks to a few months, so be patient.
-
Seedling Care:
Once the seeds have germinated, continue providing them with bright, indirect light and keep the soil evenly moist. As the seedlings grow, gradually introduce them to more sunlight to prevent sunburn.
-
Transplanting:
When the seedlings have developed several sets of true leaves and are large enough to handle, carefully transplant them into individual pots filled with potting soil. Provide adequate spacing between seedlings to allow for root development.
-
Growing Conditions:
Red Dragon Japanese Maple seedlings prefer partial shade and well-draining soil. Keep them protected from harsh sun, strong winds, and extreme temperatures during their early years.
-
Hardening Off:
Before planting the seedlings outdoors, gradually acclimate them to outdoor conditions by exposing them to increasing sunlight and reducing watering frequency.
-
Planting Outdoors:
Once the seedlings are well-established and have hardened off, plant them in their permanent location outdoors, spacing them according to their maturity.
What are the pros and cons of red dragon Japanese maple tree?
The Red Dragon Japanese Maple tree (Acer palmatum var. dissectum ‘Red Dragon’) is a popular ornamental tree prized for its stunning foliage and graceful form. Like any plant, it has its own advantages (pros) and disadvantages (cons). Let’s explore some of the pros and cons of the Red Dragon Japanese Maple:
Pros:
17 advantages of red dragon Japanese maple tree
Ornamental Beauty:
The most notable advantage of these trees is its exquisite foliage, which emerges as a vibrant burgundy-red in spring and often retains its color throughout the growing season. The finely dissected leaves create a delicate and lacy appearance, adding texture and interest to the landscape.
Versatility:
Red Dragon Japanese Maple trees are adaptable plants used in different garden settings. They work well as specimen trees, accent plants, or focal points in mixed borders, and they can also be grown in containers for patio or balcony gardens.
Compact Size:
Red Dragon Japanese Maple trees, are small and easily manageable, suitable for smaller gardens or landscapes with limited space. Their moderate growth pattern means they won’t quickly outgrow their allotted space and can be pruned to maintain a desired shape.
Fall Color:
In addition to their eye-catching springtime and summer foliage, these trees provide stunning fall colors. As temperatures cool in autumn, the leaves may change to crimson, orange, and gold shades, creating a vibrant display before dropping for winter.
Graceful Form:
With its weeping, cascading branches, the Red Dragon Japanese Maple tree has a graceful and elegant form that adds a touch of beauty to any landscape.
Adaptability:
While they prefer partial shade to full sun conditions, Red Dragon Japanese Maple trees can adapt to different soil types and environmental conditions.
Year-Round Beauty:
With their vibrant foliage and graceful form, Red Dragon Maple trees provide year-round beauty and interest in the landscape.
Enhances Landscape Design:
Whether used as a focal point, accent plant, or part of a larger design scheme, the Red Dragon Japanese Maple tree enhances the beauty and aesthetic appeal of any garden or landscape.
Pest and Disease Resistance:
They are typically resistance to pests and diseases, hence decreasing the requirement for chemical treatments.
Air Purifier:
Red Dragon Maple trees contribute to improving air quality by filtering out pollutants and particulate matter from the air, helping to create a cleaner and healthier environment.
Aesthetic Appeal:
Renowned for their stunning burgundy-red foliage and graceful, weeping form, Red Dragon Maple trees add an aesthetic touch to any landscape or garden design, enhancing visual appeal and beauty.
Health Benefits:
Spending time in a garden with Red Dragon Japanese Maple trees can provide various health benefits, including stress reduction, improved mood, and enhanced overall well-being through exposure to nature.
Adaptability to Different Light Conditions:
While they prefer partial shade to full sun conditions, they are adaptable, and can thrive in different light conditions, allowing for flexibility in landscaping and garden design.
Drought Tolerance and Watering Tips:
Red Dragon Japanese Maple trees have moderate drought tolerance once established but benefit from regular watering during dry periods, particularly in the first few years after planting. Providing consistent moisture helps maintain their health and vitality.
Pet-Friendly Nature:
They are known to be non-toxic to pets, making them safe additions to gardens or landscapes where pets may roam. Their pet-friendly nature ensures peace of mind for pet owners.
Longevity and Maintenance Tips:
With proper care and attention, these Maple trees can live for several decades or longer, providing years of beauty and enjoyment. Regular watering, occasional pruning, and protection from stressors ensure their longevity and vitality.
Minimal Upkeep:
With their small size and low trimming requirements, these trees are low-maintenance plants perfect for people who are busy or are new to gardening once established.
Cons:
Sun and Heat Sensitivity:
Red Dragon Japanese Maple trees can tolerate partial shade to full sun conditions but are sensitive to intense sunlight and heat, especially in hotter climates. In such environments, if adequate sun protection is essential, preventing the leaves from scorching or burning.
Slow Growth:
Red Dragon Japanese Maple trees are slow to moderate growers, meaning they may take several years to reach their maturity and full ornamental potential. This slow growth rate requires patience, especially for gardeners looking for quick results or instant impact in their landscapes.
Frost Sensitivity:
In regions with harsh winters or late spring frosts, these trees may be susceptible to frost damage, particularly when young. Early leaf emergence can leave them vulnerable to late-season freezes, potentially causing leaf burn or die back.
Shallow Roots:
Like many Japanese maple varieties, Red Dragon Japanese Maple trees have shallow root systems, sensitive to disturbance. Care is crucial when cultivating the soil around the tree to avoid damaging the roots, which can affect its health and stability.
Price:
These trees can be relatively expensive compared to other ornamental trees, especially when purchasing larger specimens or cultivars with desirable characteristics. However, many gardeners consider them a worthwhile investment for their beauty and longevity.
How to shape a red dragon Japanese maple tree
It is essential to shape it by maintaining its aesthetic appeal and structural integrity. Here’s a step-by-step guide on how to shape the tree:
Timing:
Pruning is best done in late winter or early spring when the plants are dormant before new growth appears. As a result, the tree endures less stress and heals from injuries more rapidly.
Assess the Tree:
Identify and remove any dead, damaged, or diseased branches before pruning. Evaluate the tree’s structure and shape to determine whether branches require shaping or thinning.
Tools:
Use hand clippers for small branches or a pruning saw for large branches. Sterilize the tools with a cleaning beverage or a weak bleaching liquid to stop the disease from spreading.
Eliminate Dead or Ill Branches:
Begin by cutting off any infected, broken, or dead branches. Make clean cuts outside the branch collar and the swelling area where the branch joins the trunk or main stem.
Thin Out Crowded Branches:
Next, thin out crowded or crossing branches to improve air circulation and sunlight penetration within the canopy. Remove branches that are growing inward or rubbing against each other.
Shape the Canopy:
To shape the canopy of the Red Dragon Japanese Maple tree, selectively prune branches to create a balanced and aesthetically pleasing form. Maintain the tree’s natural weeping habit while removing any branches that detract from its overall shape.
Maintain a Balanced Structure:
Step back occasionally to assess the tree’s shape and structure from different angles. Aim for a balanced appearance with well-spaced branches and an open canopy.
Prune Sparingly:
They generally require minimal pruning to maintain their natural form. Avoid over-pruning, as it weakens the tree and affect its health and vigor.
Monitor Growth:
After shaping the tree, monitor its growth and prune as needed to maintain its shape and size. Regular pruning can help prevent the need for more drastic pruning in the future.
Will the red dragon Japanese maple tree grow from cutting?
Yes, it can be propagated from cuttings, although it may not be as reliable as other methods such as grafting or layering. Here’s how you can propagate a the tree from cuttings:
Selecting Cuttings:
Choose healthy, semi-hardwood cuttings from the current season’s growth in late spring to early summer. Semi-hardwood cuttings are those that have partially hardened but are not fully-woody. Select cuttings 4 to 6 inches long and have several pairs of leaves.
Preparation:
Cut the selected branches below a leaf node using clean, sharp pruning shears. Remove any leaves from the lower half of the cutting, leaving a few leaves at the top to photosynthesize.
Rooting Hormone:
Immerse the cut end of the cutting into a powdered rooting hormone or gel to promote root growth. Rooting hormones can hasten the rooting process and increase the propagation success rate.
Planting:
Pour a well-draining rooting medium, such as perlite, vermiculite, or a mixture of peat moss and perlite in to small trays and pots. Plant the cuttings in the rooting medium, pressing the medium firmly around the lower portion of the cutting.
Moisture and Humidity:
Water the cuttings thoroughly and place them in a warm, humid environment with bright, indirect light. Cover the cuttings with a clear plastic bag or keep them under a propagation dome to sustain high humidity levels.
Root Development:
Monitor the cuttings periodically for evidence of root growth, which takes a few weeks or months. Check for resistance when you gently tug on the cuttings, as this indicates the presence of roots.
Transplanting:
Once the cuttings have developed a healthy root system, carefully transplant them into individual pots filled with potting soil. Constantly provide them with adequate moisture and protection from harsh conditions until they become established.
Uses of red dragon Japanese maple tree
This is a versatile and ornamental tree, offering various uses in landscaping and garden design. Here are some common uses of the Red Dragon Japanese Maple tree:
- Specimen Tree: They make excellent specimen trees due to their striking foliage and graceful, weeping form. Planting one as a focal point in a garden or landscape makes it stand out and become a captivating centerpiece.
- Accent Plant: Their vibrant burgundy-red foliage of the makes it an ideal accent plant and can be strategically placed among other plants or in mixed borders to provide contrast and visual interest.
- Container Gardening: Being well-suited for container gardening, they can be grown in large pots or containers on patios, decks, or balconies, adding a touch of elegance and color to outdoor living spaces.
- Understory Planting: Red Dragon Japanese Maple trees thrive as understory plants in woodland gardens or shaded areas. Their tolerance for partial shade makes them valuable additions beneath taller trees or shrubs, where they can add beauty and interest to the landscape.
- Border or Hedge Planting: When planted in rows or clusters, these trees are useful in creating borders or informal hedges. Their low, spreading form and vibrant foliage make them attractive options for edging along paths, driveways, or garden beds.
- Japanese Garden Design:Red Dragon Japanese Maple trees are commonly featured in Japanese garden designs, symbolizing beauty, tranquility, and harmony with nature. Their graceful form and stunning foliage complement traditional elements such as stone lanterns, bridges, and water features.
- Seasonal Interest:Beyond their striking appearance during the growing season, Red Dragon Maple trees provide seasonal interest throughout the year. In spring, their new leaves emerge in vibrant shades of red, while in fall, they transition to brilliant hues of crimson, orange, and gold, creating a colorful display.
Where do you purchase red dragon Japanese maple trees?
Internet merchants:
Many online merchants focus on offering plants and trees, particularly Japanese maples like the Red Dragon kind. Look for trustworthy online nurseries or garden centers that have a large assortment of trees and thorough product descriptions.
Specialty Plant Nurseries:
Look for specialty plant nurseries focusing on Japanese maples and other ornamental trees. These nurseries may offer different cultivars of different sizes, including rare or hard-to-find varieties.
Botanical Gardens and Arboretums:
Some botanical gardens and arboretums have plant sales or nursery sections where you can purchase Japanese maple trees, including the Red Dragon variety. These institutions often prioritize plant health and quality, assuring of getting a healthy tree.
Local Plant Sales and Events:
Look out for local plant sales, gardening events, or community festivals where you may purchase Japanese maple trees, find unique varieties, and support local growers.
Online Marketplaces:
Online markets like eBay, Etsy, or specialty plant forums may offer Red Dragon Japanese Maple trees.
What is the price of a red dragon Japanese maple tree?
The cost depends on its size, age, and source. Here are some general price ranges you might expect to encounter:
Small Size (1 to 2 feet tall): Small Red Dragon Maple trees, often sold in containers, may range from $20 to $50 or more, depending on the nursery or retailer.
Medium Size (2 to 4 feet tall): Medium-sized trees, which are a bit more established, typically range from $50 to $100 or more, depending on factors such as the quality of the tree and its source.
Large Size (4 to 6 feet tall or more): A large, fully developed tree can cost from $100 to several hundred dollars, depending on their size and age.
Rare or Specialty Varieties: Certain rare or specialty cultivars may fetch a premium price, especially if they are in high demand or difficult to propagate.
Conclusion:
The Red Dragon Japanese Maple tree has many advantages, including the ability to filter the air, low care needs, visual appeal, and health benefits. It’s a great option for improving indoor and outdoor spaces while offering enduring beauty and enjoyment because of its versatility, drought tolerance, and pet-friendliness.
Propagation of these Maple trees from seed can be a lengthy exercise, and not all seeds may germinate or produce trees with the desired characteristics. Additionally, trees grown from seed may exhibit variations in foliage color and form compared to the parent plant. As an alternative, many growers prefer to propagate them through methods such as grafting or taking cuttings to ensure consistency in traits and faster maturity.
Prices may vary regionally and over time. It’s crucial to check with different sources and compare prices before purchase. Be sure to research the seller’s reputation and read reviews before purchase. Additionally, purchasing from reputable nurseries or retailers guarantees you a quality tree.
Read more about other maples here
1. Crimson Queen Japanese Maple
5. Tamukeyama Japanese maple tree