PlantFun
Plant Needs
Sunlight
Full sun to partial sun; full sun promotes the brightest silvery foliage color and compact growth
Watering
Water deeply but infrequently, allowing the top 5–7 cm of soil to dry completely between waterings to avoid root rot
Temperature
Hardy to -10°C; avoid prolonged exposure to temperatures above 35°C to prevent foliage scorch
Characteristics
- Leaf: Narrow, lance-shaped, silvery-blue, arranged in dense whorls along erect stems
- Flower: Tiny yellow true blooms clustered within showy greenish-yellow cyathia atop tall stalks
- Stem: Sturdy, green stems containing milky, latex-like sap
Care Guide
Watering
Water every 7–10 days during extended dry spells
Fertilization
Apply a diluted, low-nitrogen balanced fertilizer once monthly. Over-fertilization may cause leggy growth and reduced foliage color intensity
Crushed eggshell top-dress：Bake and crush eggshells, then sprinkle a thin layer on soil surface to boost calcium levels and improve soil drainage; avoid mixing raw eggshells to prevent pest attractionPruning
- Remove spent flower stalks after blooming to maintain a tidy clump and encourage new growth
- Thin overcrowded stems in early spring to improve airflow and reduce disease risk
- Trim back damaged or yellowing foliage in late winter to refresh the plant’s appearance
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; sap contact or ingestion may cause oral pain, drooling, and vomiting
Humans: Milky sap causes mild skin irritation, redness, and blistering on contact; oral irritation if ingested
Garden Uses & Culture
Culture: N/A
Usage: Ornamental garden plant for drought-tolerant borders, rock gardens, and xeriscaping
