Do you mean the Chinese lanterns that make bright orange papery fruits, or a variety of Physalis that you eat the berry out of the middle?
The orange ones are not edible!
The Physalis papery cases go pale brown when they are ripe, and the berry inside turns a bright yellow. if you peel back the case you can see the berry and they are very sweet when ripe.
They do last ages in their cases, so if these are the ones you have, they should still be alright in your greenhouse