Complete Japanese Maple Tree Care Guide

Overview

With over 400 cultivars, Japanese maples (Acer palmatum) offer endless leaf shapes, colors, and forms—weeping, upright, dwarf, and full-sized. Prized for twisted trunks, stunning fall color, and delicate foliage, these slow-to-moderate growers reward proper care with decades of beauty.

Planting and Fertilizing

Plant in USDA zones 6–9 in acidic, well-drained soil. Amend the planting hole with acidic planting mix. Mound the soil slightly to direct water away from the trunk. Site in morning sun with afternoon shade—ideally under taller trees for filtered light.

Watering and Mulching

Keep soil consistently moist. Water deeply when the top 3–4 inches feel dry, soaking to 12–18 inches. Mulch 2–3 inches deep, keeping it 3 inches from the trunk to prevent rot.

Preventing Leaf Burn

Hot, windy days cause leaf edges to brown when roots can't supply water fast enough. Overwatering, over-fertilizing, or underdeveloped roots (in new trees) also cause burn. Adjust watering—don't fertilize stressed trees. A second flush of leaves usually follows.

Pests and Diseases

• Aphids/caterpillars: Treat severe infestations with pesticide.
• Verticillium wilt: Soil-borne fungus kills branches. Avoid watering the trunk to reduce risk.

Pruning

Minimal pruning needed. Best in late summer/early fall. Remove dead wood, crossing branches, small twigs on the trunk, and shape to enhance natural form.