Mountain Maple (Acer spicatum)

Mountain Maple

Acer spicatum

Its compact form brings woodland charm to small gardens. Deciduous understory tree; common name: Mountain Maple.

Partial sun
1–2/week
Beginner
🌱

Plant Needs

☀️
Sunlight Prefers partial shade or dappled woodland shade; tolerates full sun in cool temperate regions
💧
Watering Water deeply when the top 5 cm of soil is dry; avoid standing water to prevent root rot
🌡️
Temperature Extremely cold-hardy; withstands winter temperatures down to -40°C; thrives in cool temperate conditions
🔍

Characteristics

  • Leaf: Palmate, 3–5 lobed with serrated margins; bright green foliage turns yellow-orange-red in fall
  • Flower: Dense, upright spikes of small yellow-green blooms
  • Stem/Bark: Slender gray-brown stems with smooth bark when young
🛠️

Care Guide

Watering

Keep soil consistently moist during active growth periods

Fertilization

Apply a balanced organic fertilizer once at bud break. Use compost or well-rotted manure to provide slow-release nutrients

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle 1 tsp around the base monthly and water in to release nutrients
Pruning
  • Remove dead, damaged, or crossing branches in late winter before new growth emerges
  • Thin crowded stems to improve airflow and light penetration through the canopy
  • Shape lightly after flowering to maintain a compact, natural form
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No known toxic effects for humans

📖

Garden Uses & Culture

Culture: N/A

Usage: Ornamental shade tree for small gardens; valued for vibrant fall foliage