Virginia Hound's Tongue (Cynoglossum virginianum)

Virginia Hound's Tongue

Cynoglossum virginianum

Soft fuzzy leaves hold quiet woodland charm. Herbaceous perennial; common names: Virginia Hound's Tongue, Wild Comfrey.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Prefers dappled woodland shade or partial shade; avoid intense direct summer sun which can scorch foliage.
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Watering Water when the top 2–3 cm of soil feels dry; avoid overwatering to prevent root rot.
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Temperature Hardy to USDA zones 3–8; tolerates cold winters and mild summer heat up to 30°C.
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Characteristics

  • Leaf: Basal rosette of oblong, fuzzy leaves; stem leaves smaller, alternate, covered in soft hairs.
  • Flower: Tiny, pale blue to white five-petaled blooms in terminal racemes.
  • Stem: Erect, hairy stems containing milky sap.
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing which can promote leggy growth.

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours, dilute 1:20 for root drench; discard solid peels to prevent pest issues.
Pruning
  • Deadhead spent blooms to limit self-seeding, as it can spread aggressively in ideal conditions.
  • Cut back foliage to ground level after first autumn frost to tidy the planting area.
  • Remove yellowing or damaged leaves throughout the growing season to maintain plant health.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to pyrrolizidine alkaloids; ingestion may cause vomiting, diarrhea, and liver damage.

Humans: Contains pyrrolizidine alkaloids; chronic or large ingestion causes liver damage; skin irritation from contact with hairy foliage.

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Garden Uses & Culture

Culture: N/A

Usage: Historically used in limited traditional medicine, but discouraged due to toxic alkaloid content; primarily grown as a woodland ornamental.