PlantFun
Plant Needs
Sunlight
Full sun to partial shade; tolerates intense summer sunlight and mild shade in hot climates
Watering
Allow soil to dry completely between waterings; highly drought-tolerant, avoid waterlogging
Temperature
Hardy to -15°C; withstands hot, dry summers and cold winter frosts
Characteristics
- Leaf: Sword-shaped, rigid, blue-green foliage with curly white filamentous edges; terminal sharp spine
- Flower: Creamy-white, bell-shaped blooms clustered on upright panicles up to 2.4 m tall
- Stem: Short, woody underground rhizome that produces clonal offsets
Care Guide
Watering
Water deeply once weekly during extended dry spells; reduce frequency with natural rainfall
Fertilization
Diluted balanced liquid feed once monthly. Use low-nitrogen feed to promote flowering rather than excessive foliage growth
Eggshell powder topdress：Crush fully dried eggshells into fine powder; sprinkle 1 tbsp per plant in early spring and work lightly into topsoil to avoid pest attractionPruning
- Remove brown or dead leaves at the base to maintain airflow and appearance
- Cut back spent flower stalks to ground level after blooming to redirect energy to rhizome growth
- Thin overcrowded clumps every 3–4 years in early spring to reduce competition
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA confirmed toxic; saponins may cause vomiting, diarrhea, drooling, and lethargy
Humans: Contains saponins; large ingestion may cause mild gastrointestinal upset (nausea, vomiting)
Garden Uses & Culture
Culture: Symbolizes resilience and protection; used in traditional Native American crafts for cordage and basketry
Usage: Ornamental garden specimen; leaf fibers historically used for rope and textiles
