Stately ostrich fern is a tough perennial that loves moist, shady spots. Its light green fronds add delicate texture to the garden as they unfurl -- despite the plant's sturdy, carefree nature. This fern spreads by underground rhizomes, but you can keep it in bounds by digging out unwanted shoots. Name: Matteuccia struthiopteris
Spiraea vanhouttei, 6 x 5. Much like 'snowmound' but larger. Tiny white flowers (each to 1/3” diameter) appear in late April to May in umbellate clusters (to 2” wide) that profusely cover the leafy branching. Small, rhombic to obovate, coarsely serrate, dark blue-green leaves (to 1.5” long) may have or at least suggest 3-5 lobes. Fall color is usually undistinguished, but attractive purplish hues may sometimes develop.