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How to Grow Woolly Hudsonia

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Woolly Hudsonia

Hudsonia tomentosa

shrub

Hudsonia tomentosa is a low-growing, mat-forming evergreen subshrub native to sandy coastal habitats and dunes of eastern North America. It produces small yellow flowers and is highly adapted to harsh, nutrient-poor sandy soils. This rare and specialized plant is important for dune stabilization and ecosystem health.

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Example Woolly Hudsonia timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Woolly Hudsonia

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Woolly Hudsonia

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

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

Growing Conditions

☀️
Sun: Full sun, 8+ hours daily
💧
Water: Low water needs once established; requires excellent drainage. Drought-tolerant; avoid overwatering. Can be sensitive to moisture-retentive soils.
📏
Spacing: 12-18 inches
📅
Days to maturity: Variable; slow-growing; 2-3 years to reach mature size
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Planting depth: Surface sow or barely cover seeds; transplant seedlings at soil level

Soil

Type: Sandy, well-draining soil with low organic matter
pH: 5.5-7.0

Growing Zones

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Thrives in zones 4-6, hardy to zone 3

3a 3b 4a 4b 5a 5b 6a 6b

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Growth Stages

1

Germination

2-4 weeks

Tiny seedlings emerge with cotyledons; very fragile and slow-growing

Keep sandy medium moist but not wet; provide excellent air circulation and bright light. Germination can be slow and sporadic.

2

Establishment

3-6 months

Small rosette forms with fine, thread-like foliage; plant remains low and spreading

Maintain sandy, well-draining conditions; avoid fertilizing. Water sparingly. Protect from competition and shade.

3

Vegetative Growth

1-2 years

Prostrate mat develops; foliage becomes denser with woolly, gray-green appearance

Continue drought-tolerant practices. Minimal fertilizer needed. Plant thrives in poor, sandy soils.

4

Flowering

4-8 weeks

Small, bright yellow flowers appear in late spring to early summer, scattered across the mat

Ensure full sun exposure to promote flowering. Maintain dry conditions. Deadheading not necessary.

5

Seed Production

2-3 months

Small capsular fruits develop containing tiny seeds

Allow seeds to mature and dry naturally. Can collect seed in late summer if propagating.

Companion Planting

Plan your garden →

Plant with:

Bearberry Poverty grass Beach plum Dusty miller Sea oats Marram grass

Avoid planting near:

Moisture-loving plants Shade-producing trees or shrubs Aggressive competitors Plants requiring frequent fertilization

Common Pests

  • Rare in appropriate conditions; ensure good air circulation and avoid overhead watering

  • Prevent with excellent drainage and sandy soil; avoid overwatering

  • Uncommon; treat with horticultural oil if necessary

Uses

🦋

Dune Stabilization

Wildlife

Hudsonia tomentosa's dense, mat-forming growth and extensive root system make it critical for stabilizing coastal dunes and preventing erosion. It is a keystone species in many northeastern coastal ecosystems. [source]

🦋

Pollinator Support

Wildlife

The small yellow flowers provide nectar and pollen for native bees and other pollinators adapted to harsh coastal environments. [source]

🏠

Native Ornamental

Household

Its low, spreading form and year-round woolly foliage make it attractive for native plant gardens, especially in coastal or sandy areas where few plants thrive. [source]

🦋

Habitat Creation

Wildlife

Provides shelter and food sources for specialized insects and small animals adapted to coastal dune ecosystems, supporting local biodiversity. [source]

Harvest Tips

Hudsonia tomentosa is not typically harvested for food or commercial use. If collecting seeds for propagation, allow seed capsules to dry fully on the plant in late summer, then carefully collect and store in cool, dry conditions.

Fun Facts

  • 🌱 Hudsonia tomentosa is listed as a species of special concern in several northeastern states due to habitat loss from coastal development.
  • 🌱 The 'tomentosa' in its scientific name refers to the fine, woolly hairs covering the foliage, which helps the plant reduce water loss in sandy, exposed environments.
  • 🌱 This plant can live for several decades despite its small stature, making it valuable for long-term dune stabilization projects.

Gardening Terms

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

Deadhead Full Sun Germination
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