Boxwood can handle being sculpted into impressive forms and has a long history as a topiary tree. Pro tip: Choose a cultivar that naturally develops the form you’re hoping to achieve. ‘Green Tower’ and ‘Green Mountain’ are great options for upright, pyramidal growth while ‘Chicagoland Green’ boasts a round habit. Boxwood does best in full sun but can handle partial shade, though it requires well-draining soil to thrive. Prune yours in spring and again in midsummer if needed, but stop pruning in August to keep new growth from forming too close to wintertime. Boxwood is hardy in Zones 4 – 9.