Q: Would it be OK to plant apple and peach trees near each other? I worry the cross pollination would produce a weird fruit.
A: You won’t get an appeach! An apple is in the genus Malus, while a peach belongs to genus Prunus. The two are both in the rose family but they are not close enough kin to be pollen-compatible. Apples pollinate other members of the Malus genus (crabapple, etc.) and peaches pollinate members of the Prunus genus, (plum, apricot, etc.).