Equisetum hyemale
 
Common Names Scouring Rush, Rough Horsetail, Snake Grass
 
Zones 4–9
 
A striking, non-flowering perennial native to North America, Europe, and Asia, Equisetum hyemale is one of the last surviving members of a prehistoric plant lineage dating back over 350 million years. Its rigid, jointed stems resemble bamboo and remain evergreen in mild climates, adding vertical texture to wetland edges, rain gardens, and container plantings. Historically used for polishing metal due to its high silica content, this species is both ornamental and ecologically valuable.
 
Key Features
Growth Habit: Rhizomatous rush-like perennial; spreads aggressively
Height: Typically 2–4 ft (0.6–1.2 m); can reach 5 ft (1.5 m)
Stems: Hollow, dark green, vertically ridged; jointed with black bands and ash-gray sheaths
Leaves: Reduced to tiny scale-like teeth at stem nodes
Flowers: None; reproduces via spores in cone-like strobili at stem tips
Fruit: N/A; spore-bearing structures instead of seeds
Ecology: Found in wet woods, streambanks, and pond margins; tolerant of seasonal flooding and heavy shade2
 
Growing Conditions
Light: Full sun to part shade
Watering: Medium to wet; tolerates standing water up to 4 in (10 cm)
Soil: Wide tolerance; prefers moist clay, loam, or sandy substrates
Temperature: Hardy to –30°F (–34°C); evergreen in mild zones
Humidity: High tolerance; thrives in damp environments
Propagation: Rhizome division or spores
Tolerance: Heavy shade, poor soils, urban runoff
 
Landscape Use Ideal for rain gardens, pond edges, and primitive plant displays. Use in containers to restrict spread or in restoration zones for erosion control. Pairs well with Carex stricta, Iris versicolor, and Juncus effusus.