PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates dappled shade in hot, dry climates
Watering
Water deeply when the top 2–3 cm of soil is dry; avoid waterlogging in poorly drained areas
Temperature
Hardy to cold winter temperatures down to -30°C; thrives in temperate summer conditions
Characteristics
- Leaf: Opposite, lanceolate leaves fused around the stem (perfoliate), with serrated margins and fuzzy texture
- Flower: Clusters of tiny, fluffy white composite flowers arranged in flat-topped corymbs
- Stem: Erect, hairy green stems with branching near the top
Care Guide
Watering
Keep soil consistently moist during active growth periods
Fertilization
Diluted balanced organic feed once monthly. Avoid over-fertilization to prevent excessive foliage growth at the expense of flowering
Composted banana peel tea：Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench to support healthy floweringPruning
- Deadhead spent flower clusters to maintain a tidy appearance and encourage potential late-season rebloom
- Cut back stems to ground level in late fall after foliage dies back to prepare for winter dormancy
- Thin overcrowded clumps every 2–3 years in early spring to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; pyrrolizidine alkaloids may cause liver failure with prolonged exposure
Humans: Contains pyrrolizidine alkaloids; large or repeated ingestion can cause liver damage
Garden Uses & Culture
Culture: Historically used by Indigenous North American peoples to treat fevers and cold symptoms
Usage: Medicinal herb (note: toxic in large doses); ornamental wildflower for pollinator gardens
