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How to Grow Cushion Draba

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Cushion Draba

Draba polytricha

flower

Draba polytricha is a compact, mat-forming alpine perennial native to the Caucasus Mountains. It produces dense cushions of tiny, hairy leaves topped with delicate clusters of bright yellow flowers in spring. This hardy rock garden plant is prized for its ornamental foliage and cheerful blooms in well-drained settings.

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Example Cushion Draba timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Cushion Draba

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. First Cushion Draba blooms

    Mid-to-late summer

    Before the first fall frost (≈ Nov 8)

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

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily, afternoon shade in hotter zones
💧
Water: Low to moderate water needs; water sparingly once established. Keep soil moist during growing season but never waterlogged. Drought-tolerant after establishment.
📏
Spacing: 6-8 inches apart, allows for mature cushion spread inches
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Days to maturity: Not applicable for ornamental; flowering typically begins in year 2
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Planting depth: Plant at soil surface level, do not bury the rosette center

Soil

Type: Very well-draining sandy or gravelly soil, gritty alpine mix preferred
pH: 6.0-7.0
Amendments:
Coarse sand pea gravel perlite decomposed granite

Growing Zones

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Thrives in zones 3-7, prefers cooler climates

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b

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Growth Stages

1

Seedling/Establishment

6-12 weeks

Tiny rosettes emerge with fine hairy leaves, very slow initial growth

Provide bright light, excellent drainage, and gentle moisture. Protect from excessive rain and humidity. Avoid burying the crown.

2

Cushion Formation

Several months to 1+ year

Plant develops dense, tight mounds of silvery-hairy foliage; slow, steady growth outward

Maintain excellent drainage, minimal fertilizer, allow air circulation. Water only during dry spells.

3

Flowering

4-6 weeks

Dense clusters of bright yellow, four-petaled flowers emerge on short stems above the cushion

Peak bloom in spring (April-May in most zones). Deadhead spent flowers to encourage tidiness. Avoid overhead watering.

4

Seed Development

4-8 weeks

Small siliques (seed pods) form after flowering, plant maintains compact cushion form

Allow some flowers to set seed for natural propagation or collect seeds. Continue minimal watering.

5

Dormancy/Winter

3-4 months

Foliage remains evergreen but growth halts; plant is fully hardy and snow-tolerant

No watering needed. In wet climates, ensure excellent drainage to prevent rot. Protect from winter wet more than winter cold.

Companion Planting

Plan your garden →

Plant with:

Saxifraga Sempervivum Sedums Armeria maritima Dianthus alpinus Phlox subulata Lewisia Alpine poppies

Avoid planting near:

Moisture-loving plants Hostas Astilbes Ferns Impatiens plants requiring heavy watering

Common Pests

  • Spray with water or use insecticidal soap; rarely serious in well-ventilated rock gardens

  • and

    Remove debris, improve drainage, hand-pick, use copper tape or barriers around plants

  • Use sterile seed-starting mix, ensure excellent drainage and air circulation, avoid overwatering

  • Increase humidity around plant, spray with water, use miticide if severe

Uses

🎨

Alpine Rock Garden Feature

Craft

Draba polytricha is prized for creating living cushions in rock gardens, troughs, and alpine containers. Its compact mound and cheerful spring flowers provide year-round ornamental interest with minimal maintenance. [source]

🦋

Early Pollinator Food Source

Wildlife

The abundant early spring flowers provide essential nectar and pollen for emerging bees and butterflies in cool-climate regions where few other flowers are available. [source]

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Low-Maintenance Container Growing

Household

Excellent for alpine troughs, raised beds, and well-drained containers on patios or windowsills, requiring minimal watering and upkeep once established. [source]

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Garden Edging and Borders

Household

The dense cushion habit makes Draba polytricha useful for edging paths, borders, and rocky slopes where it prevents erosion and requires no mowing. [source]

Harvest Tips

This is an ornamental plant; do not harvest foliage. Collect seed pods in late spring when they turn brown and papery, before they split naturally. Store dried seeds in cool, dry conditions.

Fun Facts

  • 🌱 Draba polytricha's name 'polytricha' means 'many-haired,' referring to the dense silvery hairs covering its leaves that help it conserve moisture and reflect intense alpine sunlight.
  • 🌱 Despite their delicate appearance, these alpine cushions are extremely long-lived and can persist in rock gardens for decades with minimal intervention.
  • 🌱 The plant's extremely slow growth rate means a mature cushion may take 5-10 years to reach full size, but its longevity makes it a worthwhile investment for permanent garden features.

Gardening Terms

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

Crown Deadhead Full Sun Perennial
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