Soft ferny foliage adds an airy feeling to the shade garden. In spring, look for tubular flowers in shades of pink, white, purple or blue. Corydalis is great for early season color with its green foliage and bright blooms. Once it’s done flowering, the plant’s growth slows, making room for summer and fall-blooming perennials to take the stage. Give this plant room to grow as it has a tendency to reseed freely.