The Osage orange tree is a native of Texas, Oklahoma and Arkansas which was widely distributed in the U.S. During the middle of the 18th century. Today it is one of the most widely-grown tress in the U.S., forming hedge rows in all 48 contiguous states plus the southern pier of Canada. It's wood is frequently used for fence posts. In order for a female tree to produce seed-bearing fruit, a male tree must be in the vicinity. It is relatively easy to propagate the Osage orange by seeds.
Remove seeds from the orange, clean them under running water and pat them dry with a paper towel. If seeds will not be planted until the following spring, place the dry seeds in a sealed glass container and store in the refrigerator.
Soak the seeds in room-temperature water for 48 hours just prior to planting.
Plant in an area of full to partial sun. Spread 1 1/2 inches of loam on the ground and then use your spade to break up the top 8 inches of soil and mix the loam in well.
Plant seeds 1/2 inch deep and firm the soil slightly with your hand. Water well and keep the soil moist. Young Osage orange trees prefer a moist environment. Seeds should sprout within 2 to 3 weeks. Plant trees 20 to 30 feet apart.