My understanding is that they need a fairly dry, hot summer to produce a nice fruit. My family can do so in Southern Ontairo, and a friend managed it on a property which gets much more sun and heat than I do out here on the wet coast, but I see no reason to bother because on my
land, the chance of getting decent fruit is very low.
They are great for tossing in muffins (fresh or frozen), my son happily eats them straight, and I've added them to things like
Apple Crisp. So if they like your ecosystem, they will self seed and give you fruit, but I believe they're in the Nightshade family, so I wouldn't consider them a fodder plant without a lot more research. They're close to tomatoes and tomatillos and
local deer are happy to eat those!