Plant library · Herbs
Salvia rosmarinus
Shrub rosemary is an upright evergreen herb that brings year-round structure to sunny planting plans. At roughly 4 feet tall and wide, it reads as a small woody shrub rather than a low culinary edging plant. Use Salvia rosmarinus where its dense form can anchor a dry border, define a hedge line, or hold the back or middle of an herb bed without shading shorter plants.
Give shrub rosemary a warm, open position beside a path, patio, wall-side bed, or the sunny edge of a kitchen garden so harvesting does not require reaching through neighboring plants. Its upright habit suits a repeating hedge or a few deliberate structural plants in a dry border. Keep brassicas, carrots, beans, and sage in adjacent planting zones only where their own spacing and seasonal turnover leave the rosemary’s permanent root area undisturbed.
Set plants 3 feet apart, center to center, for a connected hedge or a closely planted border rhythm. Each shrub can mature to about 4 feet wide, so neighboring crowns may meet and overlap as they fill in. In mixed beds, reserve a roughly 4-foot-wide footprint for each plant and keep the path or bed edge close enough to reach the outside growth for clipping and harvest.
Place shrub rosemary in full sun, with at least six hours of direct light and sharply drained soil. It is best kept on the dry side once established, making it a stronger fit for raised, gravelly, or fast-draining parts of the garden than for a bed that receives frequent irrigation. Avoid low pockets and heavy, persistently wet ground where water can linger around the roots.[1][2]
Evergreen foliage keeps this shrub present in the plan through winter, so leave its mature outline clear when designing seasonal plantings around it. Harvest can run from spring through fall. Small flowers may appear from spring into summer, adding seasonal activity without changing the shrub’s role as a permanent structural plant.[1]
Do not crowd shrub rosemary into a humid, enclosed corner or between dense plants that block air movement. Wet conditions and overwatering can lead to decline, while plants left untrimmed can become bare and straggly at the base. Leave enough open space around the shrub for annual clipping after flowering and for air to move through the planting.[1][3]
Editorial content updated 2026-07-20.