Emperor Japanese Maple

Watering

Water deeply once or twice a week during the first growing season, then adjust based on rainfall. Aim for consistently moist, but not soggy, soil.

Fertilizing

In early spring, feed your Emperor Maple a balanced, slow-release fertilizer formulated for acid-loving plants. A little goes a long way.

Pruning

While minimal pruning is needed, you can remove dead, diseased, or overcrowded branches in late winter to maintain shape and encourage growth.

Mulching

Apply a 2-3 inch layer of mulch around the base of the tree to retain moisture, regulate soil temperature, and suppress weeds.

Monitoring

Keep an eye out for signs of pests or diseases. Early detection and treatment is key to a healthy tree.

Winter Care

Your Emperor Maple is winter hardy, but a young tree may benefit from a light layer of mulch around the base for added protection against harsh winds and freezing temperatures.

When it Arrives

Give your new Emperor Maple a long, deep drink upon arrival. Let the water soak in thoroughly until it runs out the drainage holes.

During the First Year

Consistency is key! Aim for waterings of 1-2 times per week during the first year, especially during hot or dry weather. Check the soil moisture regularly - stick your finger a few inches down. If it feels dry, it’s watering time.

After the First Year

As your Emperor Maple matures, it becomes more drought tolerant. Water deeply once a week, or whenever the top few inches of soil feel dry to the touch. Adjust based on rainfall and adjust watering frequency accordingly.

When It Arrives

Your new Emperor Maple has all the nutrients it needs from the nursery. Hold off on fertilizing for the first few months.

During the First Year

In early spring of the first year, give your Emperor Maple a light feeding with a balanced, slow-release fertilizer formulated for acid-loving plants. Follow the manufacturer’s instructions for dosage based on the size of your tree.

After the First Year

A single, light application of slow-release fertilizer in early spring is sufficient for mature Emperor Japanese Maples. Over fertilizing can damage the roots, so err on the side of caution.

When to Prune

Prune in late winter while the tree is dormant. Avoid pruning in spring when sap is flowing freely.

Cut Off Bad Branches

Start by removing any dead, diseased, or broken branches. This encourages healthy growth and improves air circulation.

Shape the Tree (Optional)

For a more defined look, remove any branches that rub against each other or disrupt the overall silhouette. Aim for a natural, open canopy.

Keep it Neat (Optional)

If desired, lightly prune any wayward branches to maintain a clean and tidy appearance.

Encourage Growth (Optional)

To promote bushier growth, make heading cuts by shortening branches back to a healthy lateral bud.

Clean Up

After pruning, always clean your tools with disinfectant to prevent the spread of disease.

How much sun does an Emperor Japanese Maple need?

While Emperor Maples tolerate full sun, dappled shade is ideal, especially in hotter climates. This helps prevent scorching of the leaves and maintains their vibrant color.

What kind of soil does an Emperor Japanese Maple need?

These adaptable trees thrive in well-drained, moist soil. Aim for slightly acidic soil for optimal growth. If your soil is heavy clay, consider amending it with organic matter like compost to improve drainage.

How big does an Emperor Japanese Maple get?

Emperor Japanese Maples are considered dwarf trees, maturing to a height and width of 10-15 feet. This compact size makes them perfect for smaller gardens.

Is the Emperor Japanese Maple fast-growing?

Yes. Compared to other Japanese Maples, the Emperor Maple grows relatively fast, putting on about 1 foot per year. This means you can enjoy its stunning foliage sooner.

Do Emperor Japanese Maples need a lot of fertilizer?

No, Emperor Japanese Maples are not heavy feeders. A single application of a slow-release, balanced fertilizer in early spring is sufficient for mature trees. Over fertilizing can damage the roots.

How often should I water my Emperor Japanese Maple?

Water your Emperor Maple deeply once or twice a week during the first growing season, especially during hot or dry weather. After the first year, water deeply once a week, adjusting based on rainfall. Aim for consistently moist, but not soggy, soil.

Is the Emperor Japanese Maple easy to care for?

Yes! Emperor Japanese Maples are generally low-maintenance trees. They require minimal pruning and are relatively disease and pest resistant.

Is the Emperor Japanese Maple winter hardy?

Yes, Emperor Japanese Maples are winter hardy down to USDA zone 5 (down to -25°F). Young trees may benefit from a light layer of mulch around the base for added winter protection.