Bog Rosemary (Andromeda polifolia)

Bog Rosemary

Andromeda polifolia

Its bell-shaped blooms hang like frosty pearls over boggy ground. Evergreen low shrub; common name: Bog Rosemary.

Partial sun
3–4/week
Moderate
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Plant Needs

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Sunlight Prefers partial shade; tolerates full sun in cool, moist climates; avoid intense midday sun in warm regions
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Watering Maintain consistently moist, acidic soil to mimic natural bog habitat; avoid allowing soil to dry out completely
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Temperature Cold-hardy to subzero temperatures; avoid prolonged exposure to temperatures above 25°C
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Characteristics

  • Leaf: Narrow, leathery evergreen leaves with rolled margins; dark green upper surface, silvery underside
  • Flower: Drooping clusters of bell-shaped pink to white blooms
  • Stem: Slender woody stems forming dense low mounds
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Care Guide

Watering

Keep soil constantly moist; use rainwater to preserve soil acidity

Fertilization

Diluted acidic fertilizer once monthly. Use fertilizer formulated for acid-loving plants to avoid alkalizing soil

Composted spent tea leaves:Mix fully composted tea leaves into topsoil to maintain acidity; avoid raw leaves to prevent mold growth
Pruning
  • Remove dead or damaged stems immediately after flowering to maintain plant shape
  • Thin overcrowded growth to improve airflow and reduce disease risk
  • Avoid heavy pruning; trim only to control size and remove spent blooms
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion leads to vomiting, diarrhea, weakness, and potential cardiac issues

Humans: Contains grayanotoxins; ingestion causes nausea, dizziness, and cardiac irregularities

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental bog garden plant; historical folk medicinal use is not recommended due to toxicity