Long-flowering perennials enable gardeners to fill the garden with long-lasting colour. Perennials bloom at various times through the spring until fall, with the exception of a few winter-flowering plants.
Some of the longest-lasting flowering perennials include purple coneflowers (Echinacea purpurea), black-eyed Susan (Rudbeckia fulgida "Goldsturm") and fringed-leaf bleeding heart (Dicentra Formosa). Purple coneflowers and black-eyed Susans belong to the Asteraceae plant family. The fringed-leaf bleeding heart is from the Fumariaceae plant family.
Purple coneflowers are 2 to 3 feet tall with lavender to purple flowers surrounding a reddish-orange domed centre. Black-eyed Susan plants grow to heights of 2 to 3 feet and develop upright, yellow ray florets with a dark centre. Fringed-leaf bleeding hearts are 15 to 18 inches tall with pink, red, white and purple heart-shaped flowers.
Some perennials have long blooming seasons but only produce a few flowers, while others have a lengthy blossoming period with numerous buds. The purple coneflowers have long-lasting robust blossoms June through October. Black-eyed Susan is a plentiful plant that flowers from July until October. Fringed-leaf bleeding heart plants blossom repeatedly May through August.
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- Ohio State University Extension: Perennials for Specific Sites and Uses
- University of Minnesota Extension: Perennials for Seasons Long Bloom
- Texas A&M University Extension: Purple Coneflowers
- Oregon State University Extension: Black-eyed Susan
- University of Illinois Extension: Fringed Leaf Bleeding Heart