Henry's Maple (Acer henryi)

Henry's Maple

Acer henryi

Its layered foliage turns fiery red in autumn, a quiet seasonal spectacle. Deciduous small tree; common name: Henry's Maple.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Partial to full sun; tolerates light shade, best with morning sun to avoid midday leaf scorching
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Watering Water deeply when the top 5–7 cm of soil dries out; avoid overwatering to prevent root rot
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Temperature Hardy to -15°C; withstands mild summer heat, avoid prolonged temperatures above 32°C
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Characteristics

  • Leaf: Trifoliate compound leaves, glossy dark green in summer, turning crimson in fall
  • Flower: Small, yellow-green racemes, clustered at branch tips
  • Stem/Bark: Slender, gray-brown branches with smooth young bark, developing shallow fissures with age
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Care Guide

Watering

Keep soil consistently moist during active growth periods

Fertilization

Apply balanced slow-release fertilizer once at bud break. Refrain from fertilizing after mid-summer to prevent tender late growth

Eggshell powder top dressing:Crush dried eggshells into fine powder; sprinkle 1–2 tbsp around the base; work lightly into topsoil to avoid nutrient runoff
Pruning
  • Remove dead, damaged, or crossing branches in late winter before new growth
  • Thin dense inner branches to improve air circulation and light penetration
  • Shape the canopy lightly after flowering to maintain a compact, rounded form
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

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

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

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental shade tree for small gardens; prized for vibrant autumn foliage display