Whip grafting is a method used to join two plant parts together, typically a rootstock and a scion. This technique involves making a diagonal cut on both the rootstock and the scion, allowing them to fit snugly together. The cuts should match in size and angle to ensure a successful union. After aligning the two pieces, they are bound together with tape or string to hold them in place. This method is commonly used for fruit trees and ornamental plants, as it promotes strong growth and can improve the overall health of the grafted plant.