Perennial Flowers That Bloom All Summer

Perennial flowers typically live for several years and are essential to any garden. They take some time to get going, but they are undoubtedly worth it when they start to bloom in those warm Summer months.

Summer is typically a time of holidays, great weather, and beaches. But the season also brings plenty of opportunities to get outdoors and enjoy the season’s beautiful flowers.

Perennial flowers constantly bloom throughout the summer and are not just for show. Here are some of our favorite perennial flowers that bloom all summer.

Penstemons (Penstemon)

Penstemons are members of the daisy family, but they’re not daisies! Commonly known as Beardtongues, they live throughout all of North America.

The word “Penstemon” is a Greek word where “Penta” means “Five,” which refers to the plant’s five stamens .” The stamens have tiny hairs all over them; hence this flower’s alternate nickname, the beardtongue.

These beautiful flowers come in a variety of colors and shapes. Small yellow-green star-shaped flowers are pretty standard, or even large purple blooms.

These unique plants attract butterflies and hummingbirds to the garden. Not only do they add color to your landscape, but they are also easy to grow in any sunny yard area.

You can use their cuttings if you find them growing along sidewalks or in open fields. Plant them near windows so that they catch some sun during the day and watch them grow. You can also grow Penstemons in containers and bring them indoors since they struggle during winter.

Penstemons with purple flower heads


Commonly known as Spurges, Euphorbias are a favorite for many gardeners. These plants are not only beautiful but incredibly useful.

Euphorbias are used in landscaping as ground cover. The plants are very drought-tolerant, making them an excellent choice for areas where there isn’t enough rain to moisten the ground. They’re also a good choice for areas where pests like slugs and snails might be problematic as they are pest and disease resistant.

Euphorbia - yellow spurges growing next to a bin in the garden
Yellow Spurges.

Spurges are also known for their ability to survive in extreme temperatures. For example, they can withstand temperatures as low as -40 degrees Fahrenheit and as high as 110 degrees Fahrenheit.

Spurges come in many colors, including white, red, purple, pink, orange, and yellow. Some even have variegated leaves that have black and white stripes. Euphorbias are perennials because they usually only bloom once before going dormant over winter. Be sure to cut them back before the first frost of the season to give them the best chances of blooming early the following year.

Hardy Geraniums

No Summer Garden is complete without Geraniums. You must see them in full bloom to realize why they are a favorite perennial for so many gardeners.

Also known as Cranesbill, Geraniums only bloom once before they go dormant at the end of summer. But, if you are happy with your Geraniums and want to increase the amount of them, take  some cuttings in early April of your existing ones. 

Plant the cuttings in a starter tray with soil and give them lots of water and sunlight, and next year, you will have identical blooming Geraniums.

The flowers are fragrant, making them an excellent choice for social areas in your yard. They’re also gorgeous, so they’re perfect for any home or garden that wants something that’s both beautiful and fragrant.

red and orange petal flowers
Stunning Geraniums. Photo by anna-m. w. on

Geraniums come in many colors, such as white, blue, red, purple (sometimes called “Tuscan red “), pink, and yellow. With some imagination, you can transform any outdoor area with all these available colors. 

Generally speaking, perennials do not bloom as well as annuals, but Geraniums are a real showstopper year after year.

Astrantia Major

Astrantia Major is a perennial plant that blooms in the Spring and Summer. Also known as Hattie’s Pincushion or Masterwort, it is a flower with an unusual shape. It blooms in various colors, including yellow, orange, and purple.

The flowers can be up to three inches long, and their petals have fine hairs that look almost like feathers. Like most perennials, Astrantia Major needs to be grown in moist, fertile soil with plenty of sunlight.

Astrantia Major grows best in full sun but can tolerate partial shade. The garden prefers well-drained soil with good drainage but can survive in clay soil as long as it has sufficient moisture.

This perennial can grow between three and six inches tall and can get significantly larger if given enough space to spread out. Of course, it would help if you also gave Astrantia Major plenty of water when growing, but like most perennials, you don’t need to water them during the winter.

Astrantia with purple flower heads is a great perennial that blooms


Roses are one of the most popular perennial flowers, and for a good reason. They’re easy to grow, and their blooms can last for weeks or even months. They’re beautiful in any color, but pink roses are especially popular.

The best part about growing roses is that they bloom all summer long. Just make sure you continue to deadhead your roses throughout the Summer months, as this will ensure they last longer.

There is a wide variety of roses that you can have in your garden. Whether you choose groundcover roses, climbing roses, or rambling roses, there will be a variety that suits your outdoor space.

Roses are susceptible to pests and disease, so try adding companion plants near them. However, ensure these plants are not too competitive, as this will impact your roses. These companion plants can include snowdrops or lavender, or even geraniums. 

The companion plants will attract more wildlife, which will help keep your roses pest-free.

red roses garden in bloom
A beautiful rose bush. Photo by Irina Iriser on

Knautia Macedonica 

Knautia Macedonicais a perennial that does well in full sun with slightly alkaline soil. The beautiful crimson flower blooms all Summer and is a favorite amongst bees and butterflies.

Knautia Macedonica is an excellent choice for your hanging baskets. However, it is susceptible to diseases like mildew. Therefore its recommended that you plant it with a layer of mulch or compost.

The beautiful purple flower can grow up to 75cm in height in full sun.

Knautia Macedonica in the garden with purple flower head
Knautia Macedonica are a hardy species.

Anthemis Tinctoria (Golden Marguerite)

Anthemis Tinctoria is a perennial that is native to Syria and Iran. However, the plant has been introduced to the U.S and is common in gardens across the country.

Also called the Golden Marguerite, which translates into the “Golden Daisy” for its bright yellow/golden flowers, this perennial loves to be in spots that attract the full sun.

The flowers have a strong sweet scent that can be used in potpourri or mixed with other herbs to make fragrant oil. If you want to bring the Golden Daisy inside, the flowers last about five weeks after being cut before they start to wither.

blooming coreopsis tinctoria flower with thin petals
Golden Marguerite. Photo by Skyler Ewing on

Final Thoughts On Perennial Flowers That Bloom All Summer

Summer is the best season for enjoying your garden as it is a time when flowers are blooming.

With a bit of care and attention to these perennials, you can transform your outdoor space into a spectacular area that is both fragrant and beautiful.

What do you think of this article about perennial flowers that bloom all summer? Let us know your thoughts in the comments section below or if you have any other suggestions.

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