Ferriss's horsetail (Equisetum ferrissii)
Care, watering, light and tips for Ferriss's horsetail on Floravia.
Quick facts
- Family: Equisetaceae
- Difficulty: Moderate care
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Ferriss's horsetail
Equisetum ferrissii, commonly known as 'Ferriss' Scouring-rush', is a primitive perennial fern belonging to the Equisetaceae family, characterized by its hollow, segmented, and leafless stems, which give it a unique architectural appearance. It grows in dense, upright clumps, reaching a height of up to 60-90 cm, making it ideal for adding texture and a prehistoric touch to water gardens, pond edges, or as an accent plant in large pots. Its dark green, almost metallic foliage makes it stand out in humid or contemporary landscapes.
Native range
North America (United States and Canada)
Care tips
It prefers full sun to partial shade and thrives in consistently moist or even waterlogged soils, making it ideal for water margins. Ensure abundant and constant watering, preventing the substrate from drying out completely, as it is a moisture-loving plant. Use an organic-rich substrate with good drainage, such as a pond plant mix or heavy garden soil. A common mistake is planting it in dry soils or with insufficient watering, which weakens it and hinders its establishment.
How to save a dying Ferriss's horsetail
- Warning signs
- Yellowish, dry, brittle stems. Slow or no growth.
- First aid
- Move to partial shade, increase humidity, water with chlorine-free water. Check drainage.
- What kills it
- Extreme dryness or lack of constant humidity. Direct strong sun exposure. Chlorinated water.
- Can it be saved?
- Yes, if you act quickly. Needs humidity and sun protection. Check roots if severely deteriorated.