Blue Spiderwort (Commelina coelestis)

Blue Spiderwort

Commelina coelestis

Vivid blue blooms open like tiny stars at dawn, closing by midday. Herbaceous perennial; common name: Blue Spiderwort.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Bright indirect light to partial sun; tolerates light shade, avoid intense midday direct sun
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Watering Water when top 1–2 cm of soil dries; avoid waterlogging, allow excess water to drain fully
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Temperature Thrives at 18–25°C; protect from frost, move indoors if temperatures drop below 10°C
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Characteristics

  • Leaf: Linear to lanceolate, bright green, smooth texture, arranged alternately on stems
  • Flower: Three-petaled, vivid sky-blue, with two large upper petals and one smaller lower petal; blooms last one day
  • Stem: Succulent, trailing or upright, weak stems that root at nodes when in contact with soil
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Care Guide

Watering

Keep soil consistently moist but not soggy

Fertilization

Diluted balanced feed every 2 weeks. Avoid over-fertilizing to prevent leaf burn and excessive foliage growth over flowering

Banana peel tea:Soak chopped banana peels in water for 3 days, dilute 1:10 before applying as a root drench; discard solids after steeping to avoid odor
Pruning
  • Deadhead spent blooms promptly to encourage continuous flowering throughout the growing season
  • Trim back leggy stems in early spring to promote bushier, more compact growth
  • Remove yellowing or damaged leaves to maintain plant health and tidy appearance
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental ground cover, container plant, indoor foliage accent