Whip and tongue grafting is a horticultural technique used to join two plant parts together, typically a rootstock and a scion. This method involves making matching slanted cuts on both the rootstock and the scion, allowing them to fit snugly together. The graft is then secured with tape or string to promote healing and growth. This technique is particularly effective for fruit trees and ornamental plants, as it encourages strong vascular connections between the two parts. Successful grafting can lead to improved fruit quality and disease resistance, making it a popular choice among gardeners and horticulturists.