Sarah comes closest to a true red mountain laurel. Vivid red buds open to bright pink-red flowers that hold their color rather than fading pale, and they persist a long time once open. This selection of the native Kalmia latifolia grows 4 feet tall and wide in part shade, hardy from Zone 5 through Zone 9.
Bloom comes in May in dense clusters, and the crimped buds hold for a week or more before breaking.
The growth is vigorous, compact, and dense, with lustrous deep green foliage that stays clean and disease-free through humid summers.
The size keeps it in scale for a foundation planting or a shady border where the big selections would outgrow the space. Sarah tolerates more sun than most mountain laurels, though it still performs best with afternoon shade. It wants acidic, moist, well-drained soil and struggles in heavy clay or alkaline ground. Mulch the shallow roots. Deer leave it alone.