With rich, dark foliage and bright yellow flowers, Diervilla splendens 'Nightglow™' adds dramatic color to borders, foundations, and mixed shrub beds. You get an easygoing, compact habit that fits small spaces, yet still shows up as a bold accent when planted in groups. Expect a mature size of roughly 24-36 inches tall and about 24-36 inches wide, making it a solid choice for low hedges, front-of-bed structure, or repeating color in a landscape design.
Plant in full sun to part shade. More sun typically brings stronger foliage color, while part shade can help in warmer sites. Provide average moisture as the plant establishes, then let the soil dry slightly between waterings; this shrub is adaptable and performs well in many garden soils as long as drainage is reasonable. A light mulch helps conserve moisture and moderates soil temperatures.
In late spring into summer, clusters of yellow blooms stand out against the dusky red-purple leaves and can add pollinator interest to the garden. Use this shrub to echo other warm-toned foliage plants, pair it with grasses and perennials for contrast, or mass it for a cohesive sweep of color. Prune only as needed to shape after flowering, and keep plants spaced so air can move through the canopy for best performance.