Long Blooming Perennials That Flower All Summer Long

Blanket Flower
Blanket flower (Gaillardia) is a beautiful perennial that provides multi-tone red, yellow, orange, and/or peach (depending on variety) blooms throughout the hottest months of the year. These lovely plants can grow to two or three feet tall. They grow in clusters that can have spread ranging from one to two feet wide.
Blue Clips Bell Flower
Blue clips bell flowers (Campanula carpatica) are beautiful, low-growing perennials that bloom all summer. They typically reach between eight inches and one foot in height and grow in compact clusters approximately 18 inches in diameter. They work great in polyculture garden beds, planted in front of taller flowers or shrubs.
Cranesbill
Cranesbill (Geranium), also known as true geranium or hardy geranium, is a perennial that blooms throughout the entire summer. This is not the same plant as annual geraniums (Pelargonium) that are used as bedding plants. Cranesbill will grow in full sun or partial shade. There are many varieties, which range in height from six inches to three feet.
Day Lily
Day lilies (Hemerocallis) are not only beautiful, but they are extremely low maintenance. These perennials prefer full sun but will grow and flower all summer even in partial shade. They spread aggressively and will periodically need to be divided after they finish blooming at the end of summer.
Hardy Ice Plant
Hardy ice plant (Delosperma cooperi) is a low-growing perennial succulent that produces violet/red blooms throughout the summer. This plant can handle extreme heat, drought, and even does well when planted in rocky soil. This is a short plant, growing only to a height of between three and six inches tall.
Purple Coneflower
Purple coneflower (Echinacea purpurera), also known as echinacea, is a beautiful perennial that puts on a show all summer long. A central brown, black, or orange cone rises above lovely light purple petals that droop back. This gorgeous flower also has medicinal properties believed to boost the immune system.
Shasta Daisy
Shasta daisies (Leucanthemum superbum) are beautiful classic summer flowers that have white petals and a yellow center. These long-blooming summer perennials grow in clumps and typically range from two to three feet tall. They are heat and drought tolerant.
Tickseed
Tickseed (Coreopsis) is a long-blooming perennial that produces lovely yellow or gold flowers throughout the summer months. Tickseed tends to grow in mounds. It typically reaches between one and two feet in height.