Carolina Jessamine (Gelsemium sempervirens)

Carolina Jessamine

Gelsemium sempervirens

Trumpet blooms glow like golden stars along twining vines. Evergreen woody climbing vine; common names: Carolina jessamine, yellow jessamine.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; produces the most blooms in full sun exposure
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Watering Water deeply when the top 5 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Hardy to -10°C; tolerates warm summer temperatures but benefits from afternoon shade in hot arid regions
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Characteristics

  • Leaf: Opposite, lanceolate evergreen leaves; glossy dark green, 3–7 cm long
  • Flower: Fragrant, funnel-shaped yellow blooms; clustered at stem tips
  • Stem: Slender, twining woody stems; brownish-green when mature
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Care Guide

Watering

Keep soil evenly moist during growing and flowering season

Fertilization

Apply balanced slow-release fertilizer once at the start of growing season. Avoid over-fertilizing to prevent excessive foliage growth at the expense of blooms

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench to avoid burning delicate roots
Pruning
  • Prune immediately after flowering to control growth and maintain desired shape
  • Remove dead, damaged, or diseased stems to improve airflow and reduce pest risk
  • Thin overcrowded vines to encourage better light penetration and more blooms
  • Cut back overly long trailing stems to promote bushier, more compact growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic if ingested; may cause life-threatening neurological and gastrointestinal issues

Humans: All plant parts contain gelsemine alkaloids; ingestion causes severe systemic effects

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Garden Uses & Culture

Culture: State flower of South Carolina; symbolizes southern hospitality and warmth

Usage: Ornamental climbing vine for trellises, fences, and arbors; use with caution due to toxicity