Nightshade : Many nightshade family plants are poisonous to deer and other ruminants. Deer resistant vegetables in the nightshade family include tomatoes and tomatillos, potatoes, eggplant, and some peppers. Other plants toxic to deer : Rhubarb and cucumber leaf are toxic to deer.Click to see full answer. Likewise, how do you keep deer away from tomato plants?Fill a pair of nylon stockings with a strong-scented bar soap and hang it around your tomato plants within 3 feet of each plant. If you have nothing to hang it on, hammer a stake into the soil next to the tomato plants or use a tomato cage.Additionally, are tomato leaves poisonous? Tomato Leaves and Their Poisonous Rap Wariness about tomato leaves stems, in large part, from the plant’s status as part of the nightshade family. While this family plays host to a variety of toxic, “deadly” plants, the tomato is not one of them, despite containing the alkaloids tomatine and solanine. Also to know, do deer eat tomatoes off the vine? Deer, birds, squirrels and raccoons all eat tomatoes (Lycopersicon esculentum), but they rarely eat an entire fruit. Instead, they take a bite or two out of each one, ruining the entire crop for you.Do deer eat tomatoes or cucumbers?well, If you have tomatoes and cucumbers grown in your garden, they will eat all of your tomatoes without any doubt. Deer really cannot eat cucumber. Deer don’t really like eating cucumber vines and leave them the same.