Mona Lavender has beautiful dark green leaves with contrasting undersides that are as purple as an eggplant. This leaf contrast is very common with many other Plectranthus species. Mona Lavender is a quick-growing perennial shrub, reaching 24 to 30 inches in height. It does very well in either shaded or partly sunny positions. When it receives sun it tends to stay smaller and more compact, and the leaves exhibit a much more intense coloring, especially on the purple undersides of the leaf. The foliage is unique and special, but the real prize on this plant is the dark lavender flower spikes. These flowers appear in early spring and continue to add color to your garden until the first frost.