Full Moon Maple (Acer shirasawanum)

Full Moon Maple

Acer shirasawanum

Its round leaves glow like full moon discs in spring, soft and luminous. Deciduous ornamental tree; common name: Full Moon Maple.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Dappled sunlight or morning partial shade; avoid intense midday summer sun to prevent leaf scorch
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Watering Water deeply when the top 5 cm of soil dries out; avoid overwatering to prevent root rot
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Temperature Hardy to -15°C; thrives in cool to temperate climates; protect from extreme summer heatwaves
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Characteristics

  • Leaf: Palmate with 7–11 rounded lobes, bright green in spring, transitioning to gold, orange, or crimson in autumn
  • Flower: Small, yellow-green umbellate clusters, clustered at bare branch tips
  • Stem/Bark: Slender, smooth greenish-brown young branches; mature bark develops subtle fissures
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Care Guide

Watering

Keep soil consistently moist during active growth periods

Fertilization

Apply balanced slow-release fertilizer once in early spring. Use a fertilizer with equal nitrogen, phosphorus, and potassium for balanced growth

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle a thin layer around the base of the tree in spring and autumn to boost soil calcium levels
Pruning
  • Remove dead, damaged, or crossing branches in late winter before new growth emerges
  • Thin crowded inner branches to improve airflow and light penetration
  • Shape lightly after leaf drop to maintain the tree's compact, rounded form
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic; no harmful effects for cats from ingestion or contact

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

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Garden Uses & Culture

Culture: Symbolizes gentle elegance and seasonal transformation in Japanese garden design

Usage: Ornamental landscape tree; container planting for small urban gardens or patio displays