Pomegranate

Shaking ash trees down in the Underworld is the only way one turns up, and it does not happen often. If you are already down there mining hellstone, shake everything you walk past and you will collect a few over a trip. The buff it feeds is the ordinary one, so there is no reason to hoard a stack beyond keeping one on the hotbar for boss attempts.

Fruit growing on a tree in hell is a nod to Persephone, who was tricked into eating pomegranate seeds in the underworld and had to keep coming back. Like the other minor fruits it has no recipe of its own and only exists to be poured into the generic juice, salad and ambrosia recipes that accept any fruit at all.