The fern has a reputation for growing endlessly in German forests and elsewhere in the world. Many gardeners appreciate various types of ferns in their green paradise as an ornamental and tropical-looking ensemble. But what about the toxicity?
Is fern poisonous to people and animals?
All fern species are considered poisonous, with the bracken fern being particularly poisonous in Germany. Fern poisoning can cause symptoms such as vomiting, diarrhea, abdominal pain, heart failure and vision problems. Animals and people should not consume or inhale fern.
All fern species are poisonous
All types of ferns are considered poisonous - some more, others less. Therefore, you should be wary of consuming any type of fern. Just inhaling the spores that are on the underside of the leaves can have negative consequences.
Adler fern – the most poisonous fern in Germany
The bracken fern, which is often found in Germany, is the most poisonous representative of the ferns in this country. It is suspected that its spores, which contain the enzyme thiaminase, have carcinogenic and bone marrow-damaging effects on the body. In addition to the spores, its leaves are toxic. They contain hydrogen cyanide glycosides and a toxic saponin. The young leaves in particular are dangerous!
The worm fern: It is better to avoid a worm treatment
Although the worm fern was previously taken as a remedy for worms, it should not be consumed. Deaths from eating this fern were not uncommon. The rhizome and stems of young plants in particular are highly toxic. Just 100 g is fatal for a cow.
Symptoms of fern poisoning
Both animals such as cats and dogs as well as people react to ferns and show the following symptoms when poisoned:
- Vomiting
- Diarrhea
- Stomachache
- Fainting
- Heart failure
- Visual problems
- motor disorders
- Disturbances in the movement sequence
- Breathing problems
Tips & Tricks
When used externally, fern is non-toxic and can be used, for example, for headaches, rheumatism, leg cramps and gout.
