The Emperor Japanese maple, also known as Acer palmatum 'Emperor', is a highly sought-after cultivar known for its exquisite foliage and graceful form. Here's some information about it:

1. Appearance: Emperor Japanese maple features deeply dissected leaves that emerge with shades of red, bronze, or purple in spring. As the season progresses, the foliage typically matures to a rich green color. In the fall, the leaves may turn shades of vibrant orange, red, or purple, adding to its ornamental appeal. The tree's branching structure often creates a graceful, cascading form.

2. Size: This cultivar typically grows as a small to medium-sized tree, reaching heights of about 12 to 15 feet with a similar spread. However, the ultimate size can vary depending on growing conditions and pruning practices.

3. Sunlight: Emperor Japanese maple thrives in partial shade to full sun. It tends to perform best when protected from the harsh afternoon sun, especially in hotter climates, to prevent leaf scorch.

4. Soil: It grows best in well-draining, acidic soil with good organic content. Ensure the soil is moist but not waterlogged, as Japanese maples are sensitive to waterlogged conditions.

5. Watering: Keep the soil consistently moist, especially during the tree's establishment period. Once established, provide regular watering, particularly during dry spells or hot weather.

6. Pruning: Pruning is generally minimal and should be done with care to maintain the tree's natural form and showcase its attractive foliage. Remove any dead, damaged, or crossing branches and prune lightly to maintain the desired shape.

7. Fertilizing: Apply a balanced fertilizer in spring to provide essential nutrients for healthy growth. Follow the manufacturer's recommendations for application rates and timing.

8. Landscape Uses: Emperor Japanese maple is an excellent choice for adding color and interest to garden beds, borders, and landscapes. It can also be grown in containers or used as a focal point in smaller gardens. Its striking foliage and graceful form make it particularly attractive when planted against a backdrop of evergreen shrubs or in Japanese-style gardens.

Overall, the Emperor Japanese maple is prized for its stunning foliage and adds a touch of elegance and beauty to any garden or landscape setting. With proper care and maintenance, it can be enjoyed for years to come.