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How to Grow Pigeonwood

Pigeonwood

Xanthoxylum clava-herculis

tree

Pigeonwood, also known as Hercules' club or toothache tree, is a deciduous to semi-evergreen native tree of the southern United States with distinctive thorny stems and aromatic compound leaves. The tree produces small yellow flowers followed by red berry-like fruits that are attractive to birds. It has traditional medicinal and culinary uses, particularly in folk medicine for toothache relief.

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

  1. Plant Pigeonwood

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Pigeonwood

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

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

Growing Conditions

☀️
Sun: Full sun to partial shade, 6+ hours of direct sunlight daily
💧
Water: Moderate watering; drought-tolerant once established. Water regularly during first growing season, then reduce frequency.
📏
Spacing: 120 inches
📅
Days to maturity: 2-3 years to productive maturity
🌱
Planting depth: Plant seeds 0.5 inches deep; transplant trees at same depth as root ball

Soil

Type: Well-draining loamy to sandy soil
pH: 5.5-7.5
Amendments:
Compost Aged manure Peat moss

Growing Zones

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Thrives in zones 7-9, hardy to zone 6b with protection

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

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Growth Stages

1

Seedling

4-8 weeks

Young seedlings with simple leaves and minimal thorns emerging from seed

Keep soil consistently moist but not waterlogged; provide bright indirect light; protect from direct sun initially

2

Juvenile

6-12 months

Developing tree with compound leaves and characteristic thorny stems becoming more prominent

Thin seedlings to strongest specimen; establish a strong central leader through selective pruning; water during dry spells

3

Vegetative

1-2 years

Established young tree with full canopy development and increasingly thorny wood

Continue training form; reduce watering as drought tolerance increases; prune out crossing or weak branches

4

Flowering

2-4 weeks in spring

Tree produces small, fragrant yellow flowers in early spring before or as leaves emerge

Minimal intervention needed; ensure adequate moisture during flowering; do not over-fertilize as this can reduce flowering

5

Fruiting

2-3 months (late spring through summer)

Small red aromatic berries develop from pollinated flowers, attractive to birds

Allow fruits to mature naturally; harvest seeds when red berries begin to darken; monitor for bird activity

Companion Planting

Plan your garden →

Plant with:

Pawpaw Redbud Dogwood Native understory shrubs

Avoid planting near:

None documented; generally compatible with native species

Common Pests

  • Prune infested leaves; encourage natural predators; neem oil spray if severe

  • Horticultural oil spray during dormant season; remove heavily infested branches

  • Hand-pick if infestation is light; use neem oil or insecticidal soap if needed

Uses

💊

Toothache relief and anti-inflammatory

Medicinal

Traditionally used by Native Americans and folk practitioners for dental pain relief due to its numbing properties. The bark and fruits contain alkaloids with local anesthetic effects. [source]

🍳

Spicy seasoning and flavor agent

Culinary

The berries have a warm, peppery, citrus-like flavor used as a spice in traditional southern cooking and modern molecular gastronomy. Can be dried and ground or used fresh. [source]

🦋

Bird food and native habitat

Wildlife

The bright red berries are highly attractive to migratory birds and native wildlife, making it valuable for ecological restoration and wildlife gardens. [source]

💊

Digestive aid and stimulant

Medicinal

Used in traditional herbal medicine as a warming digestive stimulant and circulatory tonic, particularly in Appalachian folk medicine. [source]

🏠

Natural insect repellent

Household

The aromatic compounds in the bark and leaves have mild insecticidal properties, traditionally used to repel insects in homes and stored goods. [source]

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

Harvest Tips

Harvest ripe red berries in late summer when they are fully colored but still firm; collect seeds immediately and stratify for 60 days in moist sand/peat in refrigerator before spring planting. For medicinal use, harvest bark in spring when sap is rising.

Fun Facts

  • 🌱 Pigeonwood gets its name 'Hercules' club' from the massive thorns covering its trunk and branches, reminiscent of a mythical weapon.
  • 🌱 Despite being called 'toothache tree,' chewing the bark produces a numbing sensation followed by a tingling warmth, creating a sensation similar to the Szechuan peppercorn effect.
  • 🌱 The tree is an important food source for native birds and is considered a keystone species in southeastern bottomland forests, supporting entire ecosystems.

Gardening Terms

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

Full Sun Partial Shade
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