Sticky Red Bartsia (Odontites viscosus)

Sticky Red Bartsia

Odontites viscosus

Sticky, vibrant blooms add meadow charm. Annual hemiparasitic herb; common name: Sticky Red Bartsia.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in open meadow or rock garden conditions
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Watering Water regularly during dry spells; tolerant of occasional drought once established
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Temperature Hardy to mild frosts; prefers cool temperate to Mediterranean temperature ranges
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Characteristics

  • Leaf: Narrow, lanceolate leaves with toothed margins; covered in sticky glandular hairs
  • Flower: Tubular, bright pink to red blooms clustered in terminal spikes
  • Stem: Erect, branched stems with dense sticky hairs that cling to passing insects
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Care Guide

Watering

Keep soil evenly moist during active growth periods

Fertilization

Light feed with diluted organic matter once every 3 weeks. Avoid high-nitrogen fertilizers to prevent excessive foliage growth at the expense of blooms

Banana peel compost tea:Compost banana peels for 4 weeks, dilute 1:20 with water for root drenching; avoid raw peels to prevent pest infestations
Pruning
  • Deadhead spent blooms to encourage extended flowering through early summer
  • Remove faded foliage after senescence to reduce self-seeding if desired
  • Thin dense plant clusters to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No documented toxicity to cats

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental wildflower; supports native pollinators including bees and butterflies