Acer shirasawanum is a plant that is native to eastern Asia, specifically Japan. It is a member of the maple family. The leaves of this plant are compound and have five to seven lobes. The leaves are also alternately arranged on the stem. The leaf margin is serrated. The flowers of this plant are small and green. They occur in clusters. The fruit of this plant is a winged samara.
Related plant:
Acer Shrub
Related plant:
Acer Palmatum Orange Dream
About soil condition, Acer shirasawanum prefer humus-rich, moist, well-drained soils. It also does well in full sun to partial shade but root systems are shallow so it does need consistent moisture. It has a medium growth rate.
Just like other Japanese maples, the Acer shirasawanum does best in full sun to partial shade. If you live in an area with hot summers, it's best to give this tree some afternoon shade. The Acer shirasawanum has a moderate growth rate and can reach a height of 15-20 feet and a width of 10-15 feet.
The temperature condition that is most conducive to the growth of Acer shirasawanum is a cool to cold climate. This plant cannot tolerates temperatures above freezing for extended periods of time and does best in areas where the average temperature is below 60 degrees Fahrenheit.
Ideal humidity condition for this plant is 60-70%. The plant does not like drafts, but thrives in average room humidity. It is best to maintain a consistent level of humidity to prevent the leaves from browning.
Regarding fertilizer, this plant does best with a light application of an all-purpose fertilizer in early spring. Once the plant is established, it is relatively drought tolerant and does not require a lot of supplemental watering. The root system is shallow and dense, so it is important to water regularly during the first growing season to help the plant establish a strong root system.
Pruning is an important part of maintaining a healthy Acer shirasawanum plant. Unhealthy or dead branches should be removed as soon as possible to encourage new growth. Pruning also helps to shape the plant and keep it looking its best.
Propagation of Acer shirasawanum is best accomplished by rooting softwood cuttings taken from theplant in mid to late summer. Cuttings should be taken from new growth that is still pliant, and they shouldbe about 6 inches (15 cm) long. After taking the cuttings, remove the bottom leaves and dip the cut endinto rooting hormone. Plant the cuttings in a potting mix that is about 50 percent perlite or sand for drainage.Water the cuttings well and place them in a shady location. Keep the soil moist but not soggy, andafter a few weeks the cuttings should have rooted. Once they have rooted, transplant them intoindividual pots and keep them moist until they are established.
Usually, the plant growth rate is rapid when the tree is young, but slows down as it ages. In general, full sun and moist, well-drained soil will produce the best growth. If you are growing your tree in partial shade, you may need to water more frequently. Fertilize your tree in early spring with a balanced fertilizer.
Common problems for this kind of plant are diseases such as verticillium wilt, root rot, and canker. These diseases can be controlled with fungicides. Insect pests include aphids, scale, and borers. These pests can be controlled with insecticides.
Source:
Plant Search Database - Water Use Classification of Landscape
Golden Full Moon Maple - Acer shirasawanum 'Aureum' - PNW
JC Raulston Arboretum - Our Plants - Acer shirasawanum var.
