Bowles Black Horned Violet (Viola cornuta 'Bowles Black')

Bowles Black Horned Violet

Viola cornuta 'Bowles Black'

Deep velvety blooms bring dramatic contrast to garden edges. Low-growing perennial flowering plant; common name: Bowles Black horned violet.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerate light afternoon shade in hot temperate regions to prevent petal scorch
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Watering Water when the top 2 cm of soil dries out; avoid overwatering to prevent root rot
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Temperature Hardy to -15°C; prefers cool daytime temperatures, avoid prolonged exposure above 28°C
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Characteristics

  • Leaf: Heart-shaped to ovate, medium green, slightly hairy, 2–4 cm long
  • Flower: Velvety deep purple-black petals, 2–3 cm wide, with a small pale yellow throat
  • Stem: Slender trailing stems that root at nodes to form dense ground cover mats
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; water deeply during dry spells

Fertilization

Apply diluted balanced fertilizer once monthly. Use half-strength fertilizer to prevent excessive foliage growth over flowering

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle 1 tsp per plant around the base and gently work into topsoil to avoid root disturbance
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering throughout the growing season
  • Trim back leggy stems in mid-summer to promote compact, dense growth
  • Remove yellowing or damaged foliage to maintain plant health and appearance
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic; no adverse effects with contact or ingestion

Humans: No toxic effects from typical handling or ingestion

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Garden Uses & Culture

Culture: Symbolizes modesty and faithfulness; popular for dark-themed garden color schemes

Usage: Ornamental ground cover, container edging, and small cut flower bouquets