You are buying one Black Walnut tree in a 4" pot 12 in. tall. When grown in the open Black Walnut trees reach heights of 75 ft. tall with a round low branching open crown that spreads nearly as wide as it is tall. These are self fertile but require wind for pollination. Plant more than one tree to ensure a better crop. Full sun is the ideal condition for this tree meaning it should get at least 6 hours of direct sunlight each day. Mature trees yield a ripened nut crop in early to mid autumn. These also have beautiful yellow fall foliage.The wood from these trees is prized in the wood working world for its handsome grain. Hardy zones 4-9 We DO NOT ship to HI, AK and PR We are a licensed nursery in the great state of TENNESSEE cert.#2235 Thank you for looking at our listings.