Dog Owners Urged to Take Care After Poisonous Hemlock Roots Wash Up Near St Austell

Published On: 10 February 2026Last Updated: 10 February 2026By

Cornwall Council has issued a warning after reports of hemlock water dropwort roots washing up in the St Austell area.

The roots, which can resemble parsnips, are poisonous if ingested. People are being advised not to handle them and to keep dogs well away.

What is hemlock water dropwort?

Hemlock water dropwort is a plant that typically grows along riverbanks. During the winter months, higher water levels and stronger flows can cause the roots to be washed downstream.

According to Cornwall Council, this is when the roots can end up on open ground, paths and areas where people regularly walk. Because of their shape and colour, they can sometimes be mistaken for edible plants, despite being poisonous.

Why the roots are a concern

The council has stressed that the roots are dangerous if ingested and should not be touched. While they may appear harmless, they pose a risk to both people and animals.

Winter conditions increase the likelihood of roots being washed down from riverbanks, meaning they may appear in places where they are not normally seen.

Risk to dogs and pets

Dogs are considered particularly vulnerable as they may investigate or chew unfamiliar objects while out walking. Cornwall Council is urging dog owners to stay vigilant and keep pets well away from any suspected roots.

Dog walkers in the area are advised to keep pets on a lead, especially near rivers or areas where debris has collected.

Advice for people walking in the area

Anyone who comes across roots that resemble parsnips is advised not to handle them. Extra caution is recommended during winter walks when river debris is more likely to be present.

The warning applies to the St Austell area, and people visiting or walking nearby are being encouraged to remain alert while conditions continue to cause material to wash up from local riverbanks.

People across Cornwall are being encouraged to remain alert while winter conditions continue to cause material from riverbanks to wash up in public areas.

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