Damaged grapes, grapepits, grapeskins, and their temed; the peels of a pomegranate and its blossom; nutshells, and pits are forbidden in regard to orlah, in [regard to] an asheirah, and in [regard to] a nazir, but are permitted in [regard to] reva'i. And unripe fruits that fall from a tree are all forbidden.

R' Yose says: A branch of orlah may be planted, but a nut of orlah may not be planted, because it is a fruit. And clusters containing date-buds of orlah may not be grafted.