The majority of nut trees require pollination from another nut tree. Nut trees must have a companion tree to pollinate and continue bearing nuts. According to the Purdue University Horticulture Extension, wind is the primary method of pollinating nut trees. Pollen from the male part of the flower of one nut tree transfers to the pistil of another nut tree. Some cultivars of nut trees are self-pollinators and do not require another nut tree. It is possible for you to help the process along.
Locate a compatible nut tree that will pollinate with the nut tree in your yard.
Hold a pair of pruning shears at a 45-degree angle and cut off flowering branches near the parent branch.
Fill a bucket with water. Place the flower branch in the bucket of water in the early morning hours.
Remove the branch from the bucket. Empty the bucket. Repeat the next day. Repeat the process several days in a row to pollinate the nut tree.