The "whip and tongue" technique is a method of grafting used in horticulture to join two plant parts together, typically a scion and a rootstock. This technique involves making specific cuts in both the scion and rootstock, allowing them to fit together snugly. The goal is to ensure that the cambium layers of both parts are in contact, promoting successful healing and growth. This grafting method is particularly effective for fruit trees and ornamental plants, as it allows for the combination of desirable traits from both plants. Properly executed, whip and tongue grafting can lead to strong, healthy plants that produce high-quality fruit or flowers.