Slender Vervain (Verbena rigida)

Slender Vervain

Verbena rigida

Its dense purple spikes bloom tirelessly, a carpet of summer color. Herbaceous perennial flowering plant.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in bright, direct sunlight for most of the day; tolerates light afternoon shade in hot climates
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Watering Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Tolerates mild frost down to 5°C; prefers warm temperatures between 15–25°C for optimal growth and blooming
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Characteristics

  • Leaf: Narrow, lance-shaped leaves with serrated margins, fuzzy texture, medium green hue
  • Flower: Dense terminal spikes of tiny purple, tubular flowers with long-lasting blooms
  • Stem: Erect, branching stems with fine hairs; forms compact basal rosettes
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Care Guide

Watering

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

Fertilization

Apply balanced diluted liquid fertilizer every 2 weeks to support blooming. Avoid over-fertilization to prevent excessive foliage growth at the expense of flowers

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations and odor
Pruning
  • Deadhead spent flower spikes regularly to encourage continuous blooming throughout the growing season
  • Cut back stems by half after the first flush of blooms to promote new branching and additional flower growth
  • Trim back dead or damaged foliage in late winter to tidy clumps before new spring growth emerges
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats; no reported toxicity symptoms

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

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden plant; attracts pollinators including butterflies and bees