Trident Maple

Acer buergerianum

Trident Maple is a small deciduous maple prized for its three-lobed leaves and reliable fall color. It adapts to urban sites and is popular for street plantings and bonsai.

Key Facts

  • Deciduous small to medium tree valued for three-lobed leaves and fall color.
  • Native to central and eastern China.
  • Commonly used as a street tree and for bonsai.
  • Leaves are typically three-lobed giving the common name trident.
  • Produces small, inconspicuous flowers in spring followed by samaras.
  • Tolerant of pruning and urban conditions when irrigation and soil are adequate.
  • Prefers well drained soils and can decline in waterlogged sites.
  • Propagated by seed, grafting, and various layering and cutting methods.

Trident Maple (Acer buergerianum) is a small deciduous maple prized for its three‑lobed leaves and dependable fall color. It suits urban streets, small yards and bonsai where a compact, easily pruned tree is desired but needs well drained soil to avoid decline.

Identification

Leaves are typically three‑lobed, which gives the species its common name. Trees are deciduous and produce small inconspicuous flowers in spring followed by paired samaras. Mature landscape specimens commonly reach about 20 to 30 feet tall with a similar spread, while bonsai and trained specimens are far smaller.

Best uses and where to grow

Use Trident Maple as a street tree, small shade tree or specimen in compact urban sites where space is limited. It adapts to paved environments if irrigation and soil volume are adequate. In hotter climates provide afternoon shade to reduce leaf edge scorch and protect leaf quality.

Site selection and planting

Plant in full sun to part shade with soil that is moist yet well drained. Prefers loam and slightly acidic to neutral pH and tolerates heavier soils only when drainage is good. Space trees roughly equal to their mature spread, about 20 to 30 feet apart for unpruned specimens.

Water and soil

Keep soil consistently moist without allowing waterlogging. Poor drainage and saturated soil lead to root decline and canopy thinning, while prolonged dryness and heat increase the risk of leaf scorch. Mulch to conserve moisture but keep mulch away from the trunk flare to prevent rot.

Pruning and after‑flowering care

Trident Maple tolerates pruning and responds well to shape control, making it suitable for street pruning and form correction. Structural and corrective pruning is usually done in late winter while dormant. Remove crossing branches and narrow crotches to reduce future defects as the canopy develops.

Containers and bonsai

The species is popular for bonsai and can be grown in containers with regular watering, feeding and root pruning. Containers restrict root volume so expect more frequent irrigation and scheduled repotting to maintain health and control size.

Propagation

Propagate by seed or by grafting to preserve named cultivars. Hardwood cuttings, layering and air layering are used by growers; nurseries commonly graft chosen cultivars for uniformity. Success with cuttings and layering varies by technique and season.

Problems and safety notes

Trident Maple shows good tolerance of urban conditions when soil and irrigation are adequate but will decline on waterlogged or compacted sites. This species is not known to be toxic to people or common pets; avoid feeding wilted maple leaves to horses because some Acer species can cause equine problems.

Frequently asked questions

How fast does Trident Maple grow?
Growth rate varies with site, cultivar and pruning. In favorable conditions it typically grows at a moderate pace toward the common mature height of around 20 to 30 feet.
How big does Trident Maple get?
Landscape trees commonly reach about 20 to 30 feet tall with a similar spread, though cultivar selection and pruning can produce much smaller or narrower forms.
When does Trident Maple bloom?
It blooms in spring with small inconspicuous flowers, and then produces paired samaras. Exact timing varies by climate and hemisphere.
What soil does it prefer?
Prefers moist, well drained loam with slightly acidic to neutral pH and tolerates heavier soils only when drainage is good. Avoid waterlogged or compacted sites.
Is Trident Maple safe for pets?
It is not known to be toxic to people or common pets. Note that some maple species can be harmful to horses, so consult a veterinarian before feeding any maple foliage to equines.

Gallery

Trident Maple acer buergerianum
Trident Maple (acer buergerianum) - © John Ruter, University of Georgia, Bugwood.org

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