Is Japanese Knotweed Poisonous?

Japanese knotweed is a troublesome plant that causes a lot of problems here in the UK. It grows very quickly, can cause damage as it spreads, and if there’s Japanese knotweed in your garden, you may find it difficult to sell your property.

Still, knotweed’s not all bad. Unlike some other invasive plants (such as giant hogweed, whose sap can cause severe skin inflammation), Japanese knotweed is not directly harmful to humans – in fact, you can actually cook it and eat it with no ill effect.

Of course, before you start munching on the mysterious plant that’s growing in your garden, you should first make sure it actually is Japanese knotweed and not some similar-looking species that could make you seriously ill.

Japanese Knotweed Identification

Is Japanese knotweed poisonous to animals?

Animals don’t necessarily digest food in the same way humans do, so many foods that are suitable for us are very bad for animals. Chocolate is a well-known example; while delicious for humans, it’s toxic for cats and dogs.

Is the same true of Japanese knotweed? Well, we don’t know for sure what effect Japanese knotweed has on cats and dogs – while you certainly shouldn’t feed it to your pet, if your cat or dog should snack on some knotweed when you’re not looking, it’s unlikely to cause any harm. Be sure to contact your vet if you think your pet is having a bad reaction to something they’ve eaten. Japanese knotweed can also be safely eaten by sheep, cattle horses and goats - all in all, Japanese knotweed is generally safe for humans and animals to eat.

If you’re concerned about Japanese knotweed growing on your property, Japanese Knotweed Removal can help. We have over 15 years of experience dealing with invasive weeds, and can help you identify and treat your Japanese knotweed infestation. Knotweed Herbicide Treatment