fastigate

Fastigate refers to a plant growth habit characterized by an upright, narrow, and columnar form. Plants with a fastigiate habit grow with their branches held close to the trunk, giving them a somewhat formal and architectural appearance. This growth form is often a natural characteristic of certain species or cultivars, but it can also be induced through pruning techniques.

Commonly, fastigiate trees are used in landscape design to create vertical accents, screen views, or define pathways. Their narrow profile makes them suitable for smaller gardens or spaces where a broader tree would be overwhelming. Examples of plants that often exhibit a fastigiate habit include certain varieties of Lombardy poplar, columnar oaks, and some cultivars of juniper and yew. The term originates from the Latin word "fastigium," meaning "ridge" or "gable," referring to the sharp, pointed shape that often results from this growth pattern. When selecting plants with a fastigiate habit, it is important to consider their mature size and how their upright form will integrate with the surrounding landscape over time.