Grafting is a surgical process whereby two plants in the same genus are combined to produce a new, hybrid plant. Cultivators use grafting to produce consistent crops and regenerate old trees. The most common means of grafting pear trees is known as whip grafting. Whip grafting combines the stalk of one tree (under stock) with the branch of another (bud wood) that is relatively close in diameter.
Cut the under stock's branch in a downward diagonal. Try to make a clean, single cut using a sharp grafting knife.
Cut the bud wood in a similar fashion, matching the diagonal cut's length as closely as possible.
Place the bud wood against the under stock, so that they form a single straight branch.
Wrap the union tightly with wax-based grafting tape. The wax tape will stretch with the limb, preventing damage as it grows.
Remove the tape in eight to 10 weeks, once the union knits together and there is new growth on the bud wood.