Field Horsetail
Field Horsetail
Ferns & Moss
A living-fossil plant with feathery, bottlebrush stems stiffened by gritty silica — once used to scour pots, and almost impossible to dig out of a garden.
💡 Fun Facts
- Horsetails are living fossils — their ancestors grew as tall as trees over 300 million years ago, long before the dinosaurs.
- It makes no flowers or seeds: pale, cone-tipped stems pop up first in spring to scatter spores, then feathery green shoots follow.
- Its stems are stiffened with gritty silica (like tiny grains of glass), so people once used it to scrub and polish metal.
📅 Through the Year
- Leaf-out:March to April
- Leaf fall:October to November
Name Story
Equisetum arvense
means “horse-bristle of the fields”
What does its name mean?
- Equisetum — horse-bristleLatin equus ‘horse’ + seta ‘bristle’
- arvense — of the ploughed fieldLatin arvum ‘ploughed field’Decode this word →
Its stems ring with whorls of fine green branches that fan out like the hairs of a horse’s tail — and it springs up readily across fields and bare, open ground.