Nectarines are very closely related to peaches, and the appearance of the fruit, the tree characteristics and even the flavor of the nectarine. Many botanists regard the nectarine as a fuzz-less peach, and the fruit grows in two forms, a freestone, meaning that the seed easily separates from the pulp, and a cling-stone, that is used primarily to pickle like pickled peaches. The nectarine trees are grafted onto plum rootstock to make the trees smaller, easier fruit picking and more adaptable for a small city garden.