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Persian ironwood
Parrotia Persica
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Description
The Chinese Parasol Tree, or Firmiana simplex, is a deciduous tree from East Asia, known for its rapid growth, majestic shape, and tropical-looking foliage. It naturally forms a broad, umbrella-like crown, giving it strong ornamental value in large gardens and urban parks. Its massive palmate leaves, bright green and up to 40 cm wide, create a refreshing, light shade in summer. The tree is also appreciated for its vigorous growth, heat tolerance, and unique architectural presence. In summer, it produces small greenish flowers followed by decorative seed capsules, containing shiny black seeds. As a specimen tree, Firmiana simplex is perfect for gardeners seeking rare and graphic ornamental trees. Its smooth, light green bark enhances its exotic appearance. It is undemanding in terms of soil but should be planted in a sheltered, sunny location to preserve its graceful silhouette. This tree brings a tropical atmosphere to temperate landscapes and remains hardy in mild climates.
Geographical origin: Central and southern China, Taiwan, Vietnam
Botanical family: Sterculiaceae
Notable features: Also known as “Chinese parasol tree”. Occasionally grown as bonsai in its native range. Traditionally used to make musical instruments. Rarely cultivated in Europe, making it a collector’s tree.
Mature height: 8 to 10 metres, taller in warm climates
Mature width: Up to 8 metres, depending on canopy development
Habit: Wide, parasol-like spreading crown
Bark: Smooth and green when young, turning grey with age
Foliage: Deciduous, large bright green palmate leaves with 3–5 lobes, up to 40 cm wide
Growth rate: Fast, up to 1 metre or more per year in fertile soil
Hardiness: Moderate – down to -10/-12 °C. Needs shelter from cold winds
Flowering period: May–June
Flower description: Small greenish flowers in upright panicles, not showy but nectar-producing
Fruits: Four-lobed decorative capsules opening like stars, each holding shiny black seeds
Wildlife value: Summer nectar source; birds may eat the seeds
Ideal exposure: Full sun, protected from prevailing winds
Soil preferences: Rich, well-drained, fresh to moderately dry soil. Tolerates limestone
Soil preparation: Loosen to 60 cm depth, enrich with compost. In cooler climates, plant in warmed spring soil
Spacing: 6 to 10 metres depending on design goals
Soil type: Deep, draining, neutral to calcareous, not too dry
At planting: Regular watering in the first year, especially in warm conditions
At maturity: Drought-tolerant for short periods; prefers occasional watering in dry summers
When and how: Shape the canopy in winter if needed. Remove competing leaders early. Minimal pruning overall
Methods: Sow in spring after soaking seeds. Root cuttings possible in late winter
Ideal placement: Specimen in large gardens, exotic-themed landscapes, ornamental alignments, protected patios
Recommended companions: Albizia, catalpa, crape myrtle (Lagerstroemia), paulownia, ornamental grasses, hardy tropical perennials
Cultural use: Lightweight wood used for musical instruments and decorative crafts. Cultivated as a prestigious tree in traditional Chinese gardens
Potential issues: Generally resilient. May attract aphids or scale insects in confined settings
Natural prevention: Ensure air circulation, introduce companion plants, avoid overwatering
Practical advice: Plant in rich, sunny, sheltered soil. Monitor watering for the first few years. Mulch the base in winter in cooler zones
The Firmiana simplex, or Chinese Parasol Tree, is a rare and striking ornamental tree with a wide crown, tropical foliage, and fast growth. It’s ideal as a focal point in large gardens, where it brings bold structure and exotic elegance.
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