Mountain Stewartia (Stewartia ovata)

Mountain Stewartia

Stewartia ovata

Elegant white blooms contrast with glossy foliage, a refined garden treasure. Deciduous flowering tree; common names: Mountain Stewartia, Oval-leaf Stewartia.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Thrives in bright partial sun to full sun; tolerates light dappled shade, especially in hot summer regions
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Watering Keep soil consistently moist but well-drained; avoid waterlogging to prevent root rot
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Temperature Hardy to USDA zones 5–8; tolerates cold winter temperatures down to -20°C and warm summer highs up to 30°C
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Characteristics

  • Leaf: Oval-shaped, glossy dark green foliage that turns vibrant red-orange in autumn
  • Flower: 5-petaled cup-shaped white blooms with prominent golden yellow stamens
  • Stem/Bark: Smooth, exfoliating reddish-brown bark with gray patches that becomes more decorative with age
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Care Guide

Watering

Keep soil evenly moist; water deeply during extended dry periods

Fertilization

Apply a balanced slow-release fertilizer once in early spring. Avoid over-fertilizing, as this can reduce flowering potential

Banana peel compost tea:Use fully composted banana peels steeped in water for 24 hours; dilute 1:20 before applying as a root drench to avoid nutrient burn
Pruning
  • Remove dead, damaged, or crossing branches in late winter before new growth emerges
  • Thin crowded inner branches to improve air circulation and light penetration
  • Shape lightly immediately after flowering to maintain a compact, balanced form
  • Avoid heavy pruning, as it can reduce bloom production in the following season
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No documented toxicity to cats

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden tree valued for its showy blooms, fall foliage, and decorative exfoliating bark