How to Grow Paulownia

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Paulownia

Paulownia tomentosa

tree

Paulownia is a fast-growing deciduous tree native to central and western China, known for its large heart-shaped leaves and fragrant purple, orchid-like flowers. It can reach 40-50 feet tall and is prized for its rapid growth rate, timber production, and ornamental value. The tree produces winged seeds in woody capsules that persist into winter.

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Paulownia tomentosa Paulownia fortunei Paulownia elongata Paulownia kawakamii Paulownia emarginata Paulownia australis

When should you plant Paulownia in your zone?

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Example Paulownia timeline · Pittsburgh, PA (Zone 6b)

Plant Paulownia
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Paulownia
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Paulownia dates for your own zip code.

Growing Conditions

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Sun: Full sun, 6+ hours daily for optimal growth

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Water: Moderate water needs; drought-tolerant once established. Water regularly during first 2 years, then reduce frequency. Avoid waterlogged conditions.

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Spacing: 240 inches

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Days to maturity: Begins flowering in 3-4 years from seed; reaches timber-harvesting maturity in 8-12 years

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Planting depth: Surface sow seeds; barely cover with soil or light mulch. Transplant seedlings when 2-3 inches tall.

Soil

Type: Well-draining loamy to sandy soil

pH: 5.5-7.5

Amendments:

Compost Peat moss Aged manure Sand for drainage improvement

Growing Zones

Find your zone →

Zones 5b-10a, with best performance in zones 6-9

5b 6a 6b 7a 7b 8a 8b 9a 9b 10a

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Growth Stages

Germination & Seedling

2-4 weeks

Tiny seedlings emerge with round cotyledons; develop first true leaves within 2-3 weeks. Seeds require light for germination.

Maintain consistent moisture (not waterlogged). Provide bright indirect light. Keep soil temperature 65-75°F for best germination.

Juvenile Growth

1-2 years

Rapid vertical growth with increasingly larger leaves; tree develops strong central leader. Can grow 4-6 feet in first season under ideal conditions.

Stake young trees for support in windy sites. Thin competing branches. Water deeply and regularly. Avoid heavy pruning.

Establishment & Branch Development

2-3 years

Tree develops broad crown with lateral branching. Leaves reach full size (6-12 inches long, heart-shaped). Growth continues at 3-5 feet per year.

Reduce watering as tree becomes established. Prune lower branches if desired for timber production. Monitor for pests.

Flowering

3-4 weeks in spring

Fragrant tubular flowers in shades of purple, pink, or white bloom in spring before or as leaves emerge. Flowers are 1-2 inches long, arranged in terminal panicles.

Minimize pruning during flowering. Trees need 3-4 years to reach flowering maturity. No special care needed; flowering is natural.

Seed Production & Dormancy

6+ months (autumn through early spring)

Flowers develop into distinctive woody seed capsules (1-1.5 inches long) that persist on branches through winter. Capsules split to release winged seeds.

Capsules and seeds are ornamental; no intervention needed. Trees enter dormancy in fall/winter. Pruning can be done in late winter while dormant.

Companion Planting

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Plant with:

Nitrogen-fixing legumes (for orchard systems) Ground covers beneath canopy Understory shade-tolerant plants Native flowering shrubs

Avoid planting near:

Shallow-rooted plants that need consistent moisture Sensitive plants competing for nutrients Dense plantings that reduce air circulation

Common Pests

Remove infested branches; maintain tree vigor; avoid wounding; use insecticidal treatments if severe. Difficult to control once established; prevention is key.
and
Keep trees healthy and vigorous. Remove dead wood promptly. Trunk wrapping may prevent some species. Chemical control is often ineffective.
Usually minor damage. Hand-pick if population is small. Insecticidal soap for significant infestations.
Horticultural oil spray in dormant season. Prune infested branches. Maintain tree health.

Uses

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Traditional Asian Cuisine

Culinary

Paulownia flowers are edible and used in some Asian cuisines, particularly Japanese and Chinese cooking, where they are sometimes pickled, added to soups, or used as garnish. The flowers have a mild, slightly sweet flavor. [source]

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Valuable Timber & Woodworking

Household

Paulownia wood is prized worldwide for furniture making, veneer, musical instruments, and decorative objects due to its lightweight, fine grain, and beautiful appearance. The rapid growth rate makes it an efficient sustainable timber source. [source]

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Floral Arrangements & Ornamental Use

Craft

The fragrant spring flowers are excellent for fresh or dried flower arrangements, and the dried seed capsules are used in floral design and craft projects. The entire tree serves as an ornamental specimen for landscapes. [source]

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Traditional Medicine

Medicinal

In traditional Chinese and Japanese medicine, Paulownia has been used to address respiratory conditions, coughs, and inflammatory issues. Modern research is ongoing into bioactive compounds, though clinical evidence remains limited. [source]

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Pollinator & Bird Support

Wildlife

The abundant spring flowers attract bees, hummingbirds, and other pollinators. The tree provides nesting sites and shelter for birds, and the seeds disperse via wind, supporting wildlife. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

For timber: Harvest at 8-12 years when tree reaches 40-50 feet; Paulownia wood is valuable for furniture, veneer, and musical instruments. For flowers: Cut sprays in spring just as buds open for fresh arrangements (highly fragrant). For seeds: Collect seed capsules in late fall/winter after they mature and split naturally.

Fun Facts

🌱 Paulownia is one of the fastest-growing trees in temperate climates, capable of growing 3-6 feet per year, sometimes reaching 40+ feet in just 10 years.
🌱 The tree is named after Anna Paulowna, a 19th-century Dutch princess, and is sacred in Japan where it appears on the imperial coat of arms and is considered a symbol of hope and renewal.
🌱 Paulownia wood is so lightweight yet strong that it's used to make traditional Japanese wooden sandals (geta) and has been valued for aircraft parts and musical instruments like guitars and harps.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Crown Full Sun Germination True Leaves

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