How Tall Do Rosemary Trees Grow?

Upright Varieties

• Rosemary grows slowly, but it often reaches up to 5 feet tall in the United States, averaging approximately 3 feet in height. The width of rosemary's spread often equals its height.

Dwarf Varieties

• Most dwarf varieties average about 18 inches in height, making them suitable for small gardens. The smallest rosemary variety, the Rosemarinus prostrata, grows only 6 to 8 inches high and is not suitable for growth in cold climates.

Trim and Shape

• The size and shape of rosemary plants is easily maintained by trimming and shaping the branches, which may be trained to grow around a pole or through a trellis, or encouraged in any desired direction. Trim the branches to the desired height after flowering.