Per prev pinner: My favorite perennial ever. I've had the same one at my folks house for 7 years and she does NOT have a green thumb. Blooms from May til Halloween, no joke! This is Early Sunrise Coreopsis.
Widow's Tears: This carefree perennial is one you'll definitely want in your landscape. Its velvety blossoms continue all summer and even into fall, blanketing borders, light shady areas or woodland gardens.
Purple Flowering Groundcover - Campanula Portenschlagiana - a plant that grows in less-than-ideal conditions and has long-lasting foliage. Plant care info is on the post - via Northern Shade - Gardening Daily