Part of the rub with them is that they need, or rather prefer, some genetic diversity to get fruit. It's a colonial organism, so if you see a whole big patch of them, good chance it's all the exact same one or a couple closely related ones that have spread out like the aspen trees in Colorado.

You can go buy a couple ones locally or have them mailed to you and significantly improve your chances of getting fruit. You can also hand pollinate those little red flowers with a paintbrush.