Potato Vine (Solanum laxum)

Potato Vine

Solanum laxum

Its star-shaped white blooms perfume summer evenings like soft jasmine. Evergreen climbing vine; common names: potato vine, jasmine nightshade.

Full sun
2–3/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; full sun exposure promotes maximum flowering and dense foliage growth
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Watering Water thoroughly when the top 2–3 cm of soil feels dry; avoid standing water to prevent root rot
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Temperature Tolerates mild frosts down to 5°C; optimal growth occurs at 15–25°C
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Characteristics

  • Leaf: Ovate to lanceolate, glossy medium green, arranged alternately on slender stems
  • Flower: Fragrant star-shaped white blooms with bright yellow centers, clustered in loose panicles
  • Stem: Woody climbing stems with small tendrils for anchoring to supports
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Diluted balanced liquid feed every 2 weeks. Discontinue fertilization in autumn to support natural dormancy

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations
Pruning
  • Prune immediately after flowering to control growth and encourage bushier, more abundant blooms the following season
  • Remove dead, damaged, or diseased stems to improve airflow and reduce disease risk
  • Train vines onto trellises or supports to maintain a tidy, structured growth habit
  • Trim back overgrown stems in early spring to promote vigorous new growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; solanine content may cause vomiting, diarrhea, abdominal pain, and lethargy

Humans: Contains solanine alkaloids; ingestion of large quantities causes mild gastrointestinal upset

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Garden Uses & Culture

Culture: Associated with romantic summer garden borders and fragrant evening landscapes

Usage: Ornamental climbing vine for trellises, walls, arbors, and trailing container displays