How to Grow Tiarella Dunvegan Black

Tiarella Dunvegan Black

Tiarella polyphylla 'Dunvegan Black'

flower

Tiarella Dunvegan Black is a striking foliage perennial prized for its dark burgundy-to-black palmate leaves with a contrasting central vein pattern. Delicate white or pale pink flower spikes appear in spring, complementing the dramatic dark foliage. This is an excellent ground cover and shade plant for woodland gardens and shaded borders.

Growing Conditions

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Sun: Partial to full shade; 2-4 hours of dappled sunlight ideal. Protect from intense afternoon sun, especially in warmer zones

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Water: Moderate moisture; keep soil consistently moist but not waterlogged. Water deeply during dry spells. More drought-tolerant once established, but performs best with regular moisture

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Spacing: 12-18 inches

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Days to maturity: Flowers appear in year 1-2; full plant maturity 2-3 years

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Planting depth: Plant at soil level or slightly higher; do not bury crown

Soil

Type: Well-draining, humus-rich loamy soil

pH: 5.5-7.0

Amendments:

Compost Leaf mold Peat moss or peat alternative Perlite for drainage

Growing Zones

Find your zone →

Thrives in zones 3-8, with best performance in cooler, shadier regions

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a

Growth Stages

Establishment

4-8 weeks

Young transplants developing root system and establishing basal rosette of deeply lobed foliage

Keep soil consistently moist; provide dappled shade; mulch lightly to retain moisture. Avoid transplant shock by planting in cool weather

Vegetative Growth

Spring through early summer, 8-12 weeks

Plant expands with multiple rosettes of dark, intricately veined palmate leaves; foliage deepens in color as it matures

Maintain consistent moisture; fertilize with balanced fertilizer in spring. Remove any dead or damaged foliage. Leaves may deepen in cooler weather

Flowering

Spring, 3-5 weeks

Delicate, fluffy flower spikes (panicles) emerge above foliage in white or pale pink, contrasting beautifully with dark leaves

Flowers are secondary to foliage; deadhead spent flowers to encourage continued display or leave for extended interest. Minimal fertilizer needed

Post-Flowering/Summer Growth

Summer, 8-12 weeks

Plant continues to spread and develop new foliage; flowers fade; foliage remains the main ornamental feature

Maintain moisture during hot, dry periods. Apply mulch layer to cool soil. Monitor for pests and diseases in humid conditions

Dormancy/Fall-Winter

Fall through early spring, 12-16 weeks

Foliage persists (semi-evergreen in milder zones) but growth slows; color may intensify or fade depending on temperature and light

Reduce watering slightly; avoid fertilizing. Deadhead remaining flowers if desired. In colder zones, provide light mulch for winter protection

Companion Planting

Plan your garden →

Plant with:

Heuchera Hosta Astilbe Hellebores Ferns (Polystichum, Dryopteris) Epimedium Coral bells Brunnera Liriope Heucharella

Avoid planting near:

Plants requiring full sun and dry conditions Aggressive spreading plants (mint, aggressive groundcovers) Plants competing heavily for moisture

Common Pests

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Remove by hand at night; use copper barriers or organic slug traps; encourage natural predators like ground beetles and toads
Remove affected foliage; improve air circulation; avoid overhead watering; provide dry conditions between waterings
Ensure good air circulation; avoid overhead watering; apply sulfur or neem oil if needed; thin dense growth
Increase humidity; spray foliage with water; apply insecticidal soap or neem oil in persistent cases

Uses

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Floral and foliage arrangements

Craft

The dramatic dark foliage and delicate flower spikes make Tiarella excellent for cut flower arrangements and as a focal point in shade gardens. The leaves provide long-lasting textural interest in bouquets and dried arrangements. [source]

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Shade garden ground cover

Household

Tiarella Dunvegan Black is an exceptional low-maintenance ground cover for shaded woodland areas, beneath trees, and along north-facing walls. It suppresses weeds and adds year-round ornamental value with its distinctive foliage. [source]

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Container gardening and shade borders

Household

The compact growth habit makes it ideal for containers on shaded patios and as edging in shade borders. Its dramatic coloring provides contrast in mixed shade plantings with other foliage plants. [source]

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Support for pollinating insects

Wildlife

The spring flower spikes attract early-season pollinators including bees and other beneficial insects, supporting ecosystem health in shade gardens. [source]

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Woodland and native shade gardens

Household

Tiarella is native to North American woodlands and integrates naturally into shade garden designs, woodland plantings, and naturalistic landscapes with minimal intervention. [source]

Harvest Tips

Tiarella is an ornamental foliage plant, not typically harvested. Deadhead spent flower spikes for tidier appearance, or leave for extended aesthetic interest and self-seeding. Cut back any frost-damaged foliage in spring. Leaves can be harvested for floral arrangements

Fun Facts

🌱 The name 'Tiarella' comes from the Greek word 'tiara,' referring to the distinctive tiara-shaped seed pods that develop after flowering.
🌱 Tiarella Dunvegan Black is one of the darkest foliage varieties available, with leaves that can appear almost black in cool temperatures and shade, making it exceptionally striking in the garden.
🌱 This plant reproduces via both seeds and runners, allowing it to slowly spread and fill in spaces, though it is generally well-behaved and not invasive.

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