Almost all Darwin Hybrid Tulips have proven to be good perennial so they would be your best bet if you are looking for years of colorful blooms
These varieties begin to bloom in early summer
Ox-Eye Sunflower
Its relatively fine texture sets it apart from other garden plants with less refined foliage
most white dutch clover is seeded in early spring or late summer
Astilbe - PURPLE LANCE , Perennial Size:5 Bare Root Almost all Darwin Hybrid TulipsAstilbe are a popular choice for shady gardens, where they perform well if given a rich, moist soil and regular watering. This tall, late blooming selection features showy, magenta purple plumes, over a mound of elegant, lacy green leaves. Also thrives in tubs, or mixed containers. Excellent for cutting. Seed heads may be removed, or left on the plant for winter interest. Fertilize in April and June. Plants should be divided every 2 to 3 years, in