At a Glance

TypeTree
FoliageDeciduous
Height20-40 feet (6-12 m)
Width15-30 feet (4.5-9 m)
Maturity17 years

Growing Zones

USDA Hardiness Zones

4 - 8
These zones indicate the coldest temperatures this plant can typically survive.
What's my zone? →
Frost Tolerancehardy

Overview

Parrotia persica is Persian ironwood (Persian parrotia), a spreading deciduous tree growing 20-40 feet (6-12 m) tall and 15-30 feet (4.5-9 m) wide. Glossy dark green oval leaves 2-4 inches (5-10 cm) with wavy margins — emerging with reddish-purple tints in spring. Turns yellow, orange, red, and burgundy simultaneously in fall. Tiny petal-less flowers (clusters of dark red stamens) 0.5 inch (1.3 cm) on bare branches in January-March. Exfoliating bark on mature trunks peels in patches to reveal cream, green, gray, and cinnamon — resembling Platanus bark. In Hamamelidaceae. Native to northern Iran (Alborz Mountains). A monotypic genus. Slow-growing — the primary limitation for gardeners wanting quick results. Often multi-stemmed and spreading wider than tall. No significant disease or pest problems. Drought-tolerant once established. Deer-resistant. Non-toxic. Zones 4-8. Full sun to partial shade. Growth rate is slow.

Native Range

Native to the Alborz Mountain range of northern Iran and the shores of the Caspian Sea. Found in mixed deciduous forests. A monotypic genus.

Suggested Uses

Grown as a specimen tree in residential gardens and parks spaced 15-30 feet (4.5-9 m). Exfoliating bark. Multicolor fall foliage. No significant pests. Slow-growing. Deer-resistant. Non-toxic. Zones 4-8.

How to Identify

Identified by exfoliating bark (cream, green, gray, cinnamon patches) on a spreading deciduous tree with glossy dark green oval wavy-margined leaves turning multicolor in fall. The exfoliating bark and the multicolor fall foliage are diagnostic. Distinguished from Hamamelis (witch hazel — same family, but strap-shaped petals, not petal-less stamen clusters). In Hamamelidaceae.

Appearance

Size & Dimensions

Height20' - 40'
Width/Spread15' - 30'

Reaches mature size in approximately 17 years

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~6 weeks
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Late winter (January-March). Tiny clusters of dark red stamens without petals, 0.5 inch (1.3 cm), on bare branches. 6 weeks. Subtle — visible at close range. Bee-visited on warm winter days.

Detailed Descriptions

Flower Description

Tiny clusters of dark red stamens without petals, 0.5 inch (1.3 cm) across, on bare branches in January-March

Foliage Description

Glossy dark green, oval with wavy irregular-toothed margins, 2-4 inches (5-10 cm) long; emerging with reddish-purple tints in spring; turns yellow, orange, red, and burgundy simultaneously in fall

Growing Conditions

Sun Requirements

Requires 4-10 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range5.5 - 7.5(Neutral)
357912
Soil Types
Drainagewell drained

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Time to Maturity

15-20 years

Drought Tolerance

Drought tolerant when established

Care & Maintenance

Care Guide

Full sun to partial shade (4-10 hours — full sun for vivid fall color). Well-drained soil pH 5.5-7.5 — tolerates clay. Drought-tolerant once established. No significant pests or diseases. Slow-growing. Prune in late winter (February-March) if needed. Deer-resistant. Non-toxic. Zones 4-8.

Pruning

Prune in late winter (February-March) if shaping is needed. Can be trained as a single-trunk tree or allowed to develop as a multi-stemmed spreading form. Remove dead or crossing branches. The exfoliating bark is a feature — do not strip. Minimal pruning needed.

Pruning Schedule

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early spring

Maintenance Level

very low

⚠️ Toxicity Warning

Non-toxic