Sweet Pea Shrub (Polygala × dalmaisiana) is a compact, ornamental, evergreen shrub. It's often also referred to by its other name, Polygala myrtifolia grandiflora. This milkwort hybrid is fast-growing and, in the right warm conditions, blooms in abundance from mid-spring right through the summer.It gets its name because the clusters of purplish-pink flowers it shows off look similar to those of the sweet pea plant. The foliage is a lovely gray shade, and this can add interesting contrast when planted alongside other species with normal green leaves.The Sweet Pea Shrub makes an excellent choice for use in mixed borders, as an accent shrub, a low, informal hedge, or when being displayed in decorative containers. It develops into a rounded mound and has a loose, relaxed appearance.The cut blooms also look impressive and last well in flower arrangements, although they don't have a strong fragrance. Although it won't flower as profusely, this delicate-looking shrub can tolerate temperatures into the low 20's, and it can handle a variety of well-drained soil types. Sweet Pea Shrub it isn't a very long-lasting plant, but it grows profusely and quickly and stays in bloom right through the summer. Polygala × dalmaisiana can be confused with the closely-related and similar-looking Polygala fruticosa, whose common name is Dwarf Sweet Pea Shrub.