Horsetail (*Equisetum hyemale*) is a survivor from the age of dinosaurs. With its upright, hollow, bamboo-like stems, it offers a striking modern aesthetic, but its true value to the permaculturist lies in its chemistry: it has the highest silica content in the plant kingdom, essential for strengthening other plants against disease.
Horsetail / Scouring Rush (*Equisetum hyemale*). This prehistoric plant produces no flowers or seeds, reproducing via spores and vigorous rhizomes. It is a marginal plant, meaning it thrives with "wet feet."
In Permaculture, it is indispensable as a raw material for liquid manures. Its high silicic acid content acts as armor for sensitive plants (like roses, tomatoes, and vines), physically preventing fungal spores from penetrating the leaf surface.
Medicinal Note: Traditionally used as a diuretic and remineralizer. However, it should be used with caution and specific knowledge. Its primary use here focuses on garden health.
| Scientific Name | Equisetum hyemale |
| Format / Pot Size | 11x11cm Pot |
| Hardiness Zone | Zones 3-10 (Extremely hardy) |
| Light Preference | Full Sun to Partial Shade |
| Water Needs | High (Can live in standing water) |
| Mature Size | 60cm - 1.20m Height |
1. Biodynamic Brew (Tea): Boil fresh or dried stems to create a potent antifungal spray. Apply preventatively in spring.
2. Pond Plant: Excellent marginal filter for biological ponds, oxygenating water and absorbing heavy metals.
3. Wet Soil Stabilization: The dense root mats hold riverbanks or swampy areas together where other plants rot.
Invasive Warning: *Equisetum* spreads aggressively via underground rhizomes. We strongly recommend planting it in contained pots, cement planters, or with rhizome barriers, even in the ground.
Keep the soil constantly moist or boggy. It is virtually immune to pests and diseases.