Common vetch is a very widespread plant native to North Africa and most of Eurasia. It has also been introduced to many parts of the Americas, Africa, and Australia. This aggressive plant grows in meadows and disturbed areas and is classed as an invasive species in many places, including the state of Oregon.

Common vetch contains toxic seeds that release cyanide when digested, posing serious risks to children, including heart and breathing issues. Cats and dogs can also be affected, although they experience mild toxicity. Immediate veterinary care is essential if seeds are ingested, with symptoms in animals ranging from gastrointestinal distress to lethargy.

Common vetch is native to Eurasia and has been introduced to much of the rest of the world, largely to be used as a cover or forage crop due to its nutrition and nitrogen-fixing capabilities. It provides less nitrogen than other cover crops like clover, but does not require as much maintenance. It is considered invasive by Alaska and West Virginia; it can escape cultivation and become weedy due to its aggressive self-seeding. It has also been found to release toxins that inhibit other plants, including lettuce and other weed species, and can serve as a host to some pests. Manual pulling, deep tillage, and encouraging the growth of shading crops are all methods that can control common vetch.

The best season for the removal of common vetch is late spring to early summer before the plant starts to flower and produce seeds.