Carolina Holly (Ilex ambigua)

Carolina Holly

Ilex ambigua

Its glossy evergreen leaves and red berries bring winter warmth. Evergreen shrub or small tree; common name: Carolina Holly.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Prefers full sun to partial shade; tolerates dappled shade in coastal regions and benefits from afternoon shade in hot inland areas
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Watering Water deeply when the top 5–7 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Hardy to USDA zones 6–9; tolerates mild frost and moderate summer heat
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Characteristics

  • Leaf: Glossy, elliptical to oblong leaves with smooth or slightly serrated margins, 3–7 cm long
  • Flower: Small, white, fragrant, four-petaled flowers in axillary clusters
  • Fruit: Bright red, spherical drupes (berries) ripening in autumn and persisting through winter
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Care Guide

Watering

Keep soil consistently moist during active growth periods

Fertilization

Apply acidic, slow-release fertilizer once monthly. Avoid high-nitrogen fertilizers to prevent excessive leaf growth at the expense of fruiting

Composted coffee grounds:Mix fully composted coffee grounds into the top 5 cm of soil to lower pH and add trace nutrients; avoid raw grounds to prevent soil acidity spikes
Pruning
  • Remove dead, damaged, or crossing branches in late winter to improve airflow and shape
  • Thin overcrowded stems to maintain an open, natural form
  • Prune after fruiting to preserve the winter berry display for wildlife
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; berries contain saponins that cause vomiting, diarrhea, and abdominal discomfort

Humans: Ingestion of large quantities of berries may cause mild gastrointestinal upset including nausea and diarrhea

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Garden Uses & Culture

Culture: Red berries provide critical winter food for birds; associated with Christmas holiday decor and winter cheer

Usage: Ornamental garden plant; wildlife habitat for birds and pollinators