How much sun does Great Horsetail need?

Great Horsetail grows best in part shade conditions.

When does Great Horsetail bloom?

Great Horsetail blooms in March, April, and May.

Where is Great Horsetail native?

Great Horsetail (Equisetum telmateia) is native to ID, per vouchered herbarium specimen records and regional native plant society lists.

Is Great Horsetail HOA-friendly?

Great Horsetail takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Great Horsetail

Name: Pollinator Patch
Author: Pollinator Patch

Equisetum telmateia

Last reviewed: August 2026

Toxicity unknown

Great Horsetail (Equisetum telmateia) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

part shade

Water

high

Size

12"–60" H × 6"–24" W

Bloom

Mar, Apr, May

Native to

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Browse plants for this ecoregion

Coast Range Puget Lowland Marine West Coast Forest Northwestern Forested Mountains Sierra Nevada Central California Foothills and Coastal Mountains Southern California Mountains North American Deserts Southern California/Northern Baja Coast

Great horsetail is a primitive fern that produces tall, bamboo-like green stems with distinctive whorled branches. It thrives in consistently moist to wet soils and can form dense colonies through underground rhizomes. This ancient plant goes dormant in winter, dying back completely to the ground.

In an HOA neighborhood

Great Horsetail takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Extremely aggressive spreader that can become invasive
Unusual appearance may be considered too wild or unkempt
Dies back completely in winter leaving bare ground

Wildlife value

This species provides minimal direct wildlife value as it does not produce flowers or attract pollinators. The stems may provide some shelter for small wildlife, but it is not considered a significant contributor to pollinator gardens.

Common questions

How much sun does Great Horsetail need?: Great Horsetail grows best in part shade conditions.
When does Great Horsetail bloom?: Great Horsetail blooms in March, April, and May.
Where is Great Horsetail native?: Great Horsetail (Equisetum telmateia) is native to ID, per vouchered herbarium specimen records and regional native plant society lists.
Is Great Horsetail HOA-friendly?: Great Horsetail takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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