PlantFun
Plant Needs
Sunlight
Full sun to partial shade; produces the most blooms with at least 6 hours of direct daily sunlight
Watering
Water deeply when the top 5 cm of soil feels dry; avoid overwatering to prevent root rot
Temperature
Extremely cold-hardy to -30°C; tolerates summer heat up to 35°C; enters dormancy during freezing winters
Characteristics
- Leaf: Linear, strap-like semi-evergreen leaves in dense basal clumps
- Flower: Fragrant trumpet-shaped lemon-yellow blooms, each lasting only one day
- Stem: Erect, leafless scapes bearing clusters of 6–12 individual flowers
Care Guide
Watering
Keep soil consistently moist during active growth and flowering
Fertilization
Apply balanced slow-release fertilizer at emergence. Avoid high-nitrogen fertilizers that promote foliage over blooms
Eggshell powder top-dressing：Crush dried eggshells into fine powder; sprinkle 1–2 tbsp around the base of plants; avoid direct contact with foliage to prevent burningPruning
- Deadhead spent blooms promptly to encourage extended flowering
- Cut back foliage to 10 cm above soil level after the first autumn frost
- Divide overcrowded clumps every 3–4 years in early spring to maintain vigor
- Remove yellow or damaged foliage throughout the growing season to improve airflow
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Highly toxic; ingestion can cause acute kidney failure within 36–72 hours
Humans: Ingestion of large amounts may cause mild gastrointestinal upset; cooked shoots are safe for consumption
Garden Uses & Culture
Culture: Symbolizes fleeting beauty due to its one-day bloom period, and devotion in floral traditions
Usage: Ornamental garden plant; young shoots and buds are edible when thoroughly cooked to neutralize mild toxins
