Wallflower 'Bowle's Mauve', Erysimum 'Bowles' Mauve', is highly coveted for its long blooming season from early spring into fall. Long, grey-green stems that may reach 2' or more grow clusters of 4-petaled lilac flowers. The height of this perennial makes it a good choice to plant in a mixed border, or along a garden shed or fence for a consistent colorful backdrop. Wallflower 'Bowle's Mauve,' is a short lived perennial and may need replacing after a few years. Although, it's long-lived blooms are well worth the little extra effort for gardeners who crave constant color.