White Katie Dwarf Mexican Petunia (Ruellia simplex 'White Katie')

White Katie Dwarf Mexican Petunia

Ruellia simplex 'White Katie'

Crisp white blooms glow against deep green foliage, a low-maintenance garden staple. Compact flowering perennial; common name: White Katie Mexican Petunia.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Prefers full sun for maximum flowering; tolerates partial shade in hot, arid climates to prevent leaf scorch
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Watering Water deeply when the top 2–3 cm of soil is dry; tolerate short periods of drought once established
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Temperature Thrive in warm temperatures; protect from frost below 10°C to prevent foliage damage
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Characteristics

  • Leaf: Narrow, lance-shaped leaves; deep green, glossy, arranged oppositely on stems
  • Flower: Trumpet-shaped white blooms with 5 petals, lasting one day but produced prolifically
  • Stem: Slender, upright green stems forming dense, bushy clumps
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; increase frequency during prolonged heatwaves

Fertilization

Apply diluted balanced fertilizer once monthly. Discontinue fertilization in late autumn to prepare plant for dormancy

Banana peel tea:Soak 1–2 chopped banana peels in 4 liters of water for 24 hours; strain and apply to soil at the base of the plant; avoid direct contact with foliage
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering throughout the growing season
  • Cut back stems by one-third in late winter to promote compact, bushy growth for the following year
  • Remove yellow or damaged foliage promptly to maintain plant health and visual appeal
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported adverse reactions

Humans: Non-toxic to humans; no known harmful effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden border plant; container planting for patios and balconies; pollinator-friendly nectar source