PlantFun
Plant Needs
Sunlight
Prefers partial to full shade; tolerates low indoor light but avoids intense direct sunlight that can scorch stems
Watering
Keep soil consistently moist at all times; avoid allowing the growing medium to dry out completely
Temperature
Extremely cold-hardy; tolerates cool to moderate summer temperatures but struggles in prolonged heat above 25°C
Characteristics
- Stem: Slender, segmented, dark green, hollow, with vertical silica-rich ridges
- Foliage: Reduced to tiny scale-like leaves fused tightly around stem nodes
- Sporangia: Cone-shaped strobili at stem tips to release spores in early spring
Care Guide
Watering
Maintain steady soil moisture; water when the top 1 cm of soil feels slightly dry
Fertilization
Diluted balanced liquid feed once every two months. Minimal fertilization required to avoid overstimulating lush growth that is prone to damage
Eggshell powder topdressing：Crush dried, sterilized eggshells into fine powder; sprinkle lightly on the soil surface to boost calcium levels without overfertilizingPruning
- Trim brown or damaged stems at the base to maintain a tidy clumping form
- Divide overcrowded clumps in early spring to propagate and reduce competition
- Remove any yellowing stems to improve airflow and prevent fungal growth
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Toxic; thiaminase breaks down thiamine, potentially causing neurological dysfunction, weakness, or loss of appetite
Humans: Contains thiaminase; large ingestion may cause thiamine (vitamin B1) deficiency leading to fatigue or neurological symptoms
Garden Uses & Culture
Culture: N/A
Usage: Shade groundcover for moist areas; historical use as a scouring tool due to silica-rich stems
