Great Horsetail (Equisetum telmateia) is a vigorous perennial fern ally known for its distinctive jointed, hollow stems. It thrives in wet, boggy conditions, forming dens
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Sunlight
Prefers full sun to partial shade, at least 4-6 hours daily.
Watering
Requires consistently wet to boggy soil; intolerant of drought.
Soil
Wet, boggy, clay, loam, sand
Temperature
Hardy in temperate climates, tolerating -40°C to 25°C; thrives in cool to moderate summers.
Habitat
Outdoor, Aquatic
Fertilizer
Generally not needed; apply sparingly in spring if growth is weak.
Prefers full sun to partial shade, at least 4-6 hours daily.
Requires consistently wet to boggy soil; intolerant of drought.
Wet, boggy, clay, loam, sand
Hardy in temperate climates, tolerating -40°C to 25°C; thrives in cool to moderate summers.
Outdoor, Aquatic
Generally not needed; apply sparingly in spring if growth is weak.
Plant Type
Herb
Plant Category
Ornamental, Medicinal
Plant Place Type
Ground, Garden, Groundcover
Plant Environment
Outdoor, Aquatic
Lifespan
Perennials
Plant Height
0.3-2.5 m
Spread
1-5 m
Growth Rate
Fast
Dormancy
Winter
Leaf Color
Green
Leaf Type
Scale-like
Optimal Sunlight Lux
60000
Weed Status
Yes
Toxic for humans
Yes
Rating: 5/5
Toxic for pets
Yes
Rating: 7/5
Edible
No
Contains thiaminase, which can lead to thiamine deficiency, and high levels of silica. Ingestion can cause neurological issues and other health problems, particularly in horses and other livestock. It is also considered moderately toxic to humans if consu
