Campbell's Maple (Acer campbellii)

Campbell's Maple

Acer campbellii

Its palmate leaves glow with autumn warmth, a quiet woodland treasure. Deciduous tree; common name: Campbell's Maple.

Partial sun
1/week
Moderate
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Plant Needs

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Sunlight Prefers full sun to partial shade; young saplings tolerate dappled woodland light to avoid leaf scorch
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Watering Water deeply for young trees during dry spells; established mature trees are drought-tolerant with minimal supplemental watering needs
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Temperature Hardy to -10°C; thrives in cool temperate climates and avoids prolonged extreme heat above 30°C
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Characteristics

  • Leaf: Palmate, 5–7 lobed, dark green in summer turning golden-orange in autumn
  • Flower: Small, yellow-green, clustered in racemes before leaf emergence
  • Stem/Bark: Smooth grey-brown bark when young, becoming fissured with age
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Care Guide

Watering

Water young trees weekly during extended dry periods; avoid overwatering to prevent root rot

Fertilization

Apply 5–10 cm of composted mulch as a top dressing in early spring. Avoid high-nitrogen fertilizers that may promote weak, leggy growth

Composted leaf mold:Apply as a 5 cm top dressing in early spring; lightly mix into the topsoil to improve soil structure and moisture retention without introducing odors or pests
Pruning
  • Remove dead, damaged, or crossing branches in late winter before bud break
  • Thin crowded inner branches to improve airflow and light penetration
  • Shape young trees to establish a strong central leader for upright growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats; no harmful compounds identified

Humans: Non-toxic to humans; no documented adverse effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental tree valued for vibrant autumn foliage; large shade tree for public parks and private gardens