Garden perennials are plants that come back year after year and can be a great addition to any garden. The four crossword solutions for the term GARDEN PERENNIAL are ASTER (5 letters), Peony (5 letters), BEGONIA (7 letters), and IRIS (4 letters). ASTER is a flowering plant with daisy-like flowers that come in a variety of colors. Peony is a flowering shrub with large, fragrant blooms. BEGONIA is a flowering plant with colorful foliage and flowers. Lastly, IRIS is a flowering plant with sword-shaped leaves and showy flowers.