Plant library · Shrubs
Caryopteris x clandonensis
Caryopteris, or Bluebeard, is a compact perennial shrub that brings blue flowers to the garden from late summer into early fall. Its roughly 3-foot height and width make it a useful middle layer in a sunny border, where it can bridge lower edging plants and taller shrubs behind. The late bloom period also gives pollinator-focused plantings an active finish as earlier flowers fade.
Place Bluebeard where it receives full sun and can remain visible from a path, patio, or seating area during its late-season bloom. Its rounded, 3-foot scale works well in repeated groups through a broad border or as a low, informal line along the front of taller shrubs. Keep it out of narrow passages: leave a clear route beside the planting so spring cutback and weeding do not require reaching through neighboring plants.
Set plants 3 feet apart, center to center, allowing each Bluebeard to develop its approximately 3-foot-wide canopy without crowding. In a mass planting, this creates a nearly continuous mature band while preserving enough separation for air and access. Measure spacing from the intended plant centers, not from bed edges; allow the outer plants about 18 inches of room from a path, wall, or lawn edge.
Use Bluebeard in a full-sun, low-water area with loose, well-drained soil. Avoid low spots, swales, and bed pockets that hold winter moisture, especially where drainage is slowed by dense soil or nearby hardscape. A raised planting area can help keep the crown above persistently wet ground while retaining the open exposure this shrub needs.[1][2]
Expect the planting to carry its strongest floral presence in late summer and early fall, so reserve nearby space for plants that look good earlier in the season without smothering it later. Cut Bluebeard back hard in spring; its flowers form on new growth. In colder portions of its range, stems may die back over winter, leaving an open patch until new shoots develop.
Do not rely on Bluebeard as a year-round screen or structural hedge. It is deciduous, and winter dieback can be more pronounced in colder gardens, so its footprint is best treated as a warm-season border presence. Where a continuous winter boundary matters, pair its location with nearby evergreen structure rather than expecting this shrub to hold the line alone.[1][3]
Editorial content updated 2026-07-20.