Rough horsetail
Equisetum hyemale · Equisetaceae
📷 Diego Delso · CC BY-SA 4.0
The gardener's calendar
Ideal time to plant rough horsetail: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Equisetaceae
- Plant type
- Perennial herbaceous plant without flowers (cryptogam)
- Foliage
- Evergreen, segmented green stems
- Mature height
- Approximately 60 cm
- Hardiness
- Very hardy (down to -20°C)
- Growth
- Fast and invasive
- Origin
- Europe, temperate Asia, North America
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Equisetum hyemale loves permanent moisture and space. Plant it near a water source or in a situation that stays cool.
The common mistake
Letting it grow free in the ground: its underground rhizomes colonize the entire garden in 3-4 years.
The pro's trick
Cut it flush to the ground in February: it comes back denser and towering.
Care
Light
Winter horsetail prefers partial shade but also tolerates full sun. It requires little light and adapts well to shaded conditions. Avoid intense sun exposure in summer, especially in very hot regions.
Watering
Keep the soil constantly moist, even slightly waterlogged. Horsetail thrives in humid and marshy areas. Water regularly during the growing season (spring-summer) and reduce slightly in winter, without letting the soil dry out completely.
Soil
Prefer soil rich in organic matter, slightly acidic to neutral, and constantly moist. Horsetail tolerates heavy soils and can grow in wet areas or near water sources. Adding compost in early spring boosts its vigor.
Pruning
Winter horsetail doesn't require actual pruning. Simply remove dead or damaged stems in spring to keep the plant tidy. If it becomes too dense, thin it out by removing the oldest stems at the base.
Fertilizer
Limited fertilizer is sufficient. A balanced fertilizer or one rich in potassium applied in spring stimulates growth. Don't overdo it: horsetail naturally grows on poorly fertilized soils and excessive feeding may weaken the stems.
Diseases and pests
Horsetail is very robust and rarely affected by disease. Excess nitrogen or overly rich soil can promote weak growth or stunted foliage. If prolonged waterlogging occurs (rhizome rot), improve drainage or repot in a perforated container.
Did you know?
Winter horsetail is a living fossil: its giant ancestors dominated carboniferous forests 300 million years ago, reaching over 10 meters tall! Its hollow and articulated stems contain silica, which earned it use since the Middle Ages for polishing metals and cleaning kitchen utensils.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- Dwarf horsetailEquisetum scirpoides
- Field horsetailEquisetum arvense
- Water horsetailEquisetum fluviatile
- Marsh horsetailEquisetum palustre
- Woodland horsetailEquisetum sylvaticum
- Giant horsetailEquisetum telmateia
Tips generated and checked by Viridia — adapt them to your local climate.