Gardening Flowers Perennials 17 Vibrant Perennials That Bloom All Summer for a Colorful Garden It doesn't take a lot of work to keep these flowering plants blossoming during the summer. By Viveka Neveln Viveka Neveln Viveka Neveln is the Garden Editor at BHG and a degreed horticulturist with broad gardening expertise earned over 3+ decades of practice and study. She has more than 20 years of experience writing and editing for both print and digital media. Learn about BHG's Editorial Process Updated on June 10, 2023 Trending Videos Close this video player Photo: Mark Kane Once planted, these perennials that bloom all summer do the work for you and will show beautiful colors for you to enjoy during warm days in your garden. Perennials Bloom All Season in This Easy Summer Garden Plan 01 of 17 Delightful Daylily David Speer Sunny gold Stella d'Oro daylily lights up the garden with trumpet-shaped yellow flowers all season. This tough perennial that blooms all summer scoffs at hot, dry conditions. Here, it creates a spectacular combination with blue ornamental onion (Allium azureum). 02 of 17 'Immortality' Reblooming Iris Noted for its reliable show of snowy-white flowers in spring and again in fall, this stunning tall bearded iris is among the easiest perennials to grow. The ruffled blooms are borne on 30-inch-tall stems above the swordlike foliage. 16 Colorful Perennial Flowers That Bloom from Spring to Fall 03 of 17 Luscious Reblooming Lilac Enjoy lilac's heady fragrance in spring and again from midsummer into fall with Bloomerang. This compact variety fits neatly in any garden, growing just 4 to 5 feet tall and wide. This perennial that blooms all summer bears a heavy crop of lavender-purple flowers that are perfect for cutting. 5 Simple Ways to Keep Cut Lilacs from Wilting in a Vase 04 of 17 Heavenly Hydrangea King Au Most hydrangeas bloom once and are done for the season. But Endless Summer bears blossoms on new growth—so you can enjoy the flowers several times each summer. For gardeners in cold climates where winter damage prevents other hydrangeas from flowering, 'Endless Summer' ensures a spectacular show. 05 of 17 Reliable Repeat-Blooming Rose Dean Schoeppner Beautiful Knock Out roses are truly some of the easiest plants you can grow in your garden. They bloom almost continuously through the summer and are virtually disease free and hardy to boot. Shown here is Pink Double Knock Out; the series also includes red, double red, single pink, yellow, and more. 06 of 17 Climb New Heights with Clematis Doug Hetherington Jazz up your garden with Jackmanii clematis. Its royal purple petals cover the plant in early summer, and it blooms sporadically for the rest of the growing season. 07 of 17 Deep Purple Delight Peter Krumhardt As you might guess from its name, May Night perennial salvia puts on a spectacular show of deep purple spires in late spring. However, if you cut off the flowers as they begin to fade, it blooms again later in summer. 08 of 17 Bountiful Blooming Bleeding Heart Peter Krumhardt Fringed bleeding heart is the perfect size for semi-shady small-space gardens. And while the old-fashioned types flower just once in spring, this little dynamo is a perennial that blooms all summer. It slows down during the warmest days but picks up the pace again in autumn. 16 Brilliant Ideas for Small Backyard Gardens 09 of 17 Rozanne Reblooming Perennial Geranium Justin Hancock Sporting clear purple blooms from late spring through fall freezes, Rozanne geranium makes a colorful statement in part shade to full sun. The spreading plant can reach 3 feet wide, creating a mass of beautiful foliage to boot. 10 of 17 Blanket Flower Bonanza The orange tubular flowers of Commotion Tizzy blanket flower give the impression of exploding fireworks. This sizzling sun-loving perennial that blooms all summer does especially well if spent flowers are removed. 11 of 17 Vibrant Valerian Dean Schoeppner Add a delightful dose of vivid pink to your yard with valerian. It blooms nearly nonstop from spring through fall in well-drained sunny sites. Deadhead the plant to prevent it from spreading by seed and speed rebloom. 12 of 17 Sunny Coreopsis Denny Schrock Coreopsis, also known as tickseed, produces scores of sunny yellow flowers in summer. 'Domino', pictured here, has a mahogany band near the bloom's center. Pluck off spent blooms to prevent seed formation and to keep the plant blooming profusely. 12 Flower Gardening Tips for Designing a Beautiful Landscape 13 of 17 Delightful Shasta Daisy Denny Schrock The pure white blooms of Becky Shasta daisy brighten the perennial garden with their cheery display. As flowers fade, cut them off, and you'll be rewarded with a repeat showing. 14 of 17 Constant Color from Catmint Catmint. Dean Schoeppner Lovely purple flower spikes set off the gray-green foliage of Walker's Low catmint. Give the plant a haircut after its initial flush of flowers in late spring to keep it compact and initiate another bloom cycle. Count on catmint to be low-maintenance and to stand up to hot and dry conditions. 15 of 17 Sensational Speedwell Denny Schrock An unsung hero of the garden and a perennial that blooms all summer, speedwell comes in a variety of shades of blue, pink, or white. All produce upright flower spikes on mounded plants. After the first set of blooms begins to fade, shear the plant to encourage branching and rebloom. This combination of spike speedwell, Knock Out rose, and Six Hills Giant catmint creates a spectacular season-long show. 16 Long-Living Perennials That Will Last for Decades with Little Care 16 of 17 Versatile Rose Verbena Dean Schoeppner Rose verbena forms a cascading groundcover that spruces up a slope with season-long bloom. It flowers best in the cooler weather of spring and fall, but it is seldom without some splashes of color. 17 of 17 Stick with Pincushion Flower Mark Kane Butterfly Blue pincushion flower is a nonstop perennial that blooms all summer. The cushion-like blue flowers are on slender stalks reaching 12 to 15 inches tall and are a surefire way to attract butterflies. Was this page helpful? Thanks for your feedback! Tell us why! Other Submit