Sweet potato vines (either purple or lime green) are potentially toxic depending on how much of the plant is eaten. Diarrhea is the most commonly reported problem.

There are many different species of sweet potato and all belong to the morning glory family (Ipomoea species). The toxicity of the different species varies. The seeds are the most toxic if chewed and swallowed. The seeds contain hallucinogenic compounds such as LSD, and therefore can cause a variety of neurologic signs.

To be safe do not let your dog eat the leaves of the sweet potato vine!