Film, that puts you close to me. Our Rubus phoenicolasius are very successful in woods with minimum light. If anything you'll end up with more of them than you want if you're not careful.
Are you looking for more traditional foods, or are you open to native wildflowers? Previous owner threw some potatoes down my hill and those are still coming up with no real assistance. But there are tons of edible wildflowers that could enjoy a shady life.
