Erysimum ‘Erysistible Yellow’ is pure sunshine in plant form, firing off golden-yellow blooms from early spring through fall with an energy that just won’t quit. Unlike short-lived wallflowers, this compact, long-blooming perennial keeps pumping out flowers while thriving in heat, drought, and tough soils. Bees and butterflies love it, deer ignore it, and you get a low-maintenance explosion of color for borders, containers, and cottage gardens. Bright, bold, and ridiculously easy to grow—this one’s a keeper.