Johnson Blue geranium is a mounding, creeping, weaving perennial that grows 15 to 18 inches tall and 2 to 3 feet wide. Foliage is deeply lobed, nearly segmented, and is soft green and slightly hairy. Fall leaf color is crimson to purple. Its flowers, while not true blue, are a lovely periwinkle blue with a violet eye, five-petaled, and seem to bloom from late spring to fall. It has a tendency to weave in and around other perennials creating a lovely ground cover. Use in borders, rock gardens, or at the feet of taller shrubs and ornamental grasses.
Grow in well drained soil of nearly any type, in full sun to part shade. It can be sheared back after flowering to give it a tidier appearance, but it isn't necessary. The best time to cut back the foliage is in late winter to early spring, before new foliage emerges. Perennial geraniums, the true geranium, are not related to the fun-loving, annual plant commonly called "geranium" - those are pelargoniums.