"Almost anything, if you eat it in large amounts, could be dangerous," said Charlie Nardozzi, the senior horticulturalist with the National Gardening Association. "It doesn't mean you shouldn't garden, you just need to do it with a bit of knowledge."
Nardozzi recommends that anyone who starts a garden, or who is just checking out farmer's markets, ask lots of questions.
"If you're just buying food at a farmer's market -- sometimes people are just really shy about it, they see an unusual food there and they don't really know how to eat it," Nardozzi said. "I would trust the person growing it."
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