That is a tomatillo plant! When the husks turn brown and dry, harvest. The green tomato-like fruit inside can be used in salsas and other dishes. I have one on my back porch in Atlanta, and it has gone gangbusters this summer!
Maybe a species in the Physalis genus? I don’t know which one this is. I could only speculate here, perhaps the cultleaf groundcherry (P. angulata) perhaps? Check out these included links below and see if you have a match. Best wishes!