Is bracken poisonous to livestock?

Yes, bracken is toxic to livestock. It causes thiamine deficiency in horses and cattle if they eat it in quantity, which is why sheep and cattle won't touch mature bracken and farmers lose grazing land as it spreads.

Why is bracken so hard to get rid of?

Bracken has an extensive underground rhizome system that can extend several metres in a single growing season. Cutting the fronds only provides temporary relief because the plant just sends up new growth from its underground reserves, so effective control requires repeated cutting over several years or chemical treatment.

Is bracken native to the UK or invasive?

Bracken is entirely native to Britain and has been here for millennia. It's not an invasive species, it's just a native plant that's become problematic because it spreads aggressively and crowds out other vegetation.

Under Your Boots

The Bracken Advance: When One Fern Decides to Own the Entire Hillside

Bracken spreads aggressively, crowds out almost everything else, and costs upland farmers a small fortune to control. This native UK fern can form near-monocultures across hillsides and moorlands.

7 August 20267 min read