PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates dry, nutrient-poor soils and open meadow conditions
Watering
Drought-tolerant; water deeply only during prolonged, extreme dry spells to avoid overwatering
Temperature
Cold hardy to USDA zones 3–8; survives harsh winter temperatures with minimal protection
Characteristics
- Leaf: Opposite, lanceolate to ovate leaves with smooth margins; pale green undersides
- Flower: Clusters of small, fragrant pink or white tubular blooms
- Stem: Slender, branching stems with milky sap when broken
Care Guide
Watering
Water occasionally during extended dry periods to support bloom production
Fertilization
No regular fertilization required. Excess fertilizer can lead to leggy growth and reduced bloom production
Composted eggshell powder：Sprinkle a thin layer around the base of plants in early spring; avoid direct contact with stems to prevent irritationPruning
- Remove spent flower heads in mid-summer to prevent unwanted self-seeding
- Cut back dead, brown stems to ground level in late winter to promote new spring growth
- Thin overcrowded clumps every 2–3 years to improve airflow and reduce disease risk
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; contains cardiac glycosides that can cause vomiting, weakness, and irregular heartbeat
Humans: Contains cardiac glycosides; ingestion may cause nausea, vomiting, and cardiac arrhythmias in large quantities
Garden Uses & Culture
Culture: N/A
Usage: Historically used for fiber production by Indigenous North American peoples; avoid medicinal use due to high toxicity
