Japanese spirea (Spiraea japonica 'Little Princess') is a tidy, compact shrub that brings fresh color to smaller spaces. You will get the best flowering and dense growth in full sun, but it will also perform well with some afternoon shade in hotter areas.
In early summer, flat-topped clusters of bright pink flowers sit above neat, medium-green foliage, creating a classic cottage-garden look that fits easily into foundation beds, borders, and mixed shrub plantings. Its naturally mounded habit keeps it looking polished with minimal shaping.
Expect a mature height of about 24-36 inches. Use it to edge a path, tuck it into a rock garden, or repeat it in groups for a low, colorful hedge. Give plants enough room for airflow and their mature width, and keep soil evenly moist as new plants establish.
Prune after the main bloom to encourage a fresh flush of growth and maintain a compact form. A simple spring cleanup to remove winter dieback is usually all that is needed for reliable performance year after year.