Equisetum fluviatile, known as water horsetail, is a UK native with upright, hollow, jointed green stems, sometimes with whorls of thin side branches. It has no flowers and makes spores in cone-like tips on the stems.

Water horsetail at a glance

Botanical name Equisetum fluviatile
Common name Water horsetail, swamp horsetail
Plant type Semi-evergreen horsetail with creeping roots
Height and spread About 50 cm–1 m tall, 50–100 cm wide
Flowers None; it makes spores in cone-like stem tips
Position Full sun or part shade
Soil Wet soil or shallow water; any type or pH
Pond depth 0–15 cm of water over the crown
Hardiness RHS H7 – very hardy (below -20°C)
Native to UK (native)

Where to plant water horsetail

  • The margin of a wildlife pond, up to 15 cm deep
  • Wet ground beside a pond or stream

Does it spread?

Yes. It spreads by creeping roots and can form dense colonies, so grow it in an aquatic basket. It is generally free of pests and diseases.

Is it poisonous?

Horsetails contain thiaminase and are a known risk to horses that eat them in quantity, often in hay. Keep it away from grazing animals and do not eat it.

Which size should I buy?

Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 come in 7 cm, 9 cm, 1 litre and 3 litre bare-root sizes and cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.

Pond depth: 0 - 15cm

Light: Full sun or part shade

Hardiness: Hardy

Height and spread: 80 - 120cm tall, 50 - 100cm wide

Planting and flowering months are shown in the calendar under the photos.

Bare root (7 cm, 9 cm, 1 litre, 3 litre): plants sent without a pot or compost, ready to plant straight away. The most economical way to plant a group.

Potted (9 cm, 1 litre, 3 litre): plants growing in our recycled, peat-free compost made in Lincolnshire. Larger sizes give a faster display.

Pack of 3 (7 cm bare-root, 9 cm bare-root, 1 litre bare-root, 3 litre bare-root): three plants of the chosen size at a lower price per plant.

2x Pot & Compost: two plants supplied with pots and compost.

Sizes shown with a line through them are currently unavailable.

At Lincs Plants, we strive to provide fast and reliable shipping to ensure your plants arrive in perfect condition. We offer 1-3 day shipping through a variety of dispatch methods to suit your needs.

Processing Time:
Orders are processed within 1 - 3 business day after payment confirmation. Orders placed on weekends or public holidays will be processed the next business day.

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Should you have any questions or concerns about your shipment, feel free to contact us.