Grow Vegetables. When you find a potato that's started to turn green because it has been exposed to light, what do you do, simply cut the green bit off and eat the rest? I think you're probably OK to do that, but check out this video, evaluate the risk, you might change your mind. It's up to you. This is a free subscription channel. Grow Vegetables poisonous green potatoes. Meg's in the kitchen, Meg's in the shot!