The leaves, stems, and tubers of sweet potato vine are not toxic. The tubers are edible, but ornamental varieties were bred to produce lovely foliage, not a delicious crop. If you want to eat the tubers, it's better to plant a variety specifically meant for food production.
Are sweet potato vines poisonous to pets?
Although the sweet potato itself is not toxic to felines, the vines of the sweet potato plant contain the toxic principle LSD. Consuming a small portion of the sweet potato vine can cause a dermatitis-type reaction, causing the cat's skin, mouth or throat to blister and swell upon contact.
Can you eat sweet potato off a sweet potato vine?
If you want sweet potatoes to eat, the tubers from your ornamental sweet potato vines are indeed edible.
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