Walnut trees can grow approximately 35–130 feet tall, depending on the species, variety, and growing conditions. Many mature English walnut trees reach around 40–60 feet, while black walnut trees commonly grow 50–75 feet or taller. Their broad canopies provide substantial shade, making them attractive additions to larger properties.

Walnut trees prefer full sun, well-drained soil, and adequate space for root development. When selecting a variety, consider its mature height, canopy spread, and proximity to buildings or other plants.