Weigela × 'Stunner' is a compact, mound-shaped shrub grown for its sleek, dark purple foliage and vivid pink spring flowers. You will get the best color and the strongest bloom when you plant it in full sun, though it will also grow well with some afternoon shade, especially in warmer areas.
Plan for a mature size of about 36-48 inches tall and roughly 36-48 inches wide. Give it room to fill out, and place it where the foliage can provide contrast next to lighter greens, golds, or silvery plants. A spot with well-drained soil is ideal; avoid low areas that stay soggy after rain.
Water regularly during the first growing season to help it establish a deep, resilient root system. After that, provide consistent moisture during extended dry spells. A 2-3 inch layer of mulch helps even out soil temperature and moisture and keeps the root zone healthier through summer heat and winter cold.
For the tidiest shape and the best repeat performance, prune or lightly shear right after the main flush of flowers finishes. This timing allows new growth to mature before the next season. With its bold foliage and bright blooms, Weigela × 'Stunner' works beautifully as a specimen, in mixed shrub borders, or repeated in groups for a strong color statement.