The practice of pleaching is a technique involving tree branches. The term comes from the Old French verb “plaissier,” which is based on the Latin verb “plectere,” meaning “to plait.” The most commonly used tree for pleached walkways is the Tilia (lime) tree. For this technique, the trees are planted in lines and the branches are woven together to strengthen and fill a structure, making for a romantic, shady corridor. This type of gardening originated in medieval times and was a popular practice until the early 18th century.