Last Updated on October 31, 2021 by Phil
Want to complete the colors of the rainbow in your garden? Here are the most beautiful blue perennial flowers available.
When it comes to the colors of the garden, you’ll often see the same few staples. These include, green, brown, white, yellow, red and pink. In some cases, there are oranges.
From there, the only thing that varies is the shade of those colors.
These are popular backyard and garden colors because they’re representative of nature.
But, if you’re looking to add a splash of something new that’s not often seen, here are some amazing blue-colored perennials that will differentiate your front or backyard from those of your neighbors.
Most Beautiful Blue Perennial Flowers
Butterfly Pea
A butterfly pea (Centrosema virginianum) is a trailing vine with light blue-violet colored blooms.
They are most prominent during the spring and summer seasons. And, are likewise a good choice if you want to attract more bees, bees and butterflies to your garden.
As beautiful as they are, you won’t have a lot of options to choose here. That’s because of the 40 different species in the world, only 3 are native to the U.S.
Globe Thistle
For something unique looking, these are worth considering.
As its name implies, globe thistle have blue-colored spherical-shaped blooms that make them catch anyone’s attention.
Add to the fact that they can grow as high as 5 feet tall makes them an amazing addition to the borders of your garden.
There’s no double that once people see your garden, the globe thistles will be one of the first things they notice.
These beautiful perennials enjoy dry, rocky and shallow soil. So, they do need a bit of preparation ahead of time since they aren’t the same with most flowers.
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Forget-Me-Nots
The forget-me-not is botanically known as Myosotis sylvatica. They are small but beautiful plants that with light blue (almost the color of the sky blue) and having a yellow and white middle.
While the blooms themselves are small, if you look closely they have a lovely design to them making them very delicate looking.
Forget-me-nots are native to Europe. But, they have since been naturalized here in the states. The best places to grow them if you want to keep them outdoors all year round are in USDA Hardiness Zones 3 through 8.
Fairy Bellflower
image from Pitnerest
Fairy Bellflower (Campanula persicifolia) are sun loving flowers that add a touch of class and elegance to any garden. They are easy to grow, and don’t experience pests or disease which make them low maintenance as well.
These beautiful blooms come in a violet-blue shade or white. Since there are a number of different blue to purple-blue shades available, you’ll want to check out a few of them before making your final decision. Try to look at as many as you can so find the perfect shade of blue you’re looking for.
Fairy Bellflowers do best in USDA Hardiness Zones 3 to 8 where they grow all year round in your garden. They grow to about 1 to 3 feet high and around 1 to 2 feet wide.
Agapanthus
Agapanthus are also called African lilies. Some people are more specific referring to them as Blue African Lilies.
But, whichever name you use, what you get is a beautiful flower with loose clusters of blue blooms.
Blue African Lilies are very prolific in that they can produce over 100 blossoms every summer. This makes them an amazing addition to your garden if you want to add sporadic blotches of blue colors that aren’t too overwhelming.
Because of their lovely looks, these are perfect for cut flower gardens, borders, edging and beds.
Columbine
Columbine plants (Aquilegia) grow in a variety of colors including blue. But, you can likewise have them in red, pink, purple, orange, yellow and white.
Thus, you can actually make an entire bed of these blue perennial flowers and combine its color varieties to landscape your garden.
These plants are small flowers that grow as high as 15 to 20 inches tall and up to a foot or foot and a half wide.
They enjoy slightly acidic soil. And, they aren’t overly fussy about the amount of light they receive. They’ll do well in both full sun and partial shade. Thus, growing them outdoors won’t be too much of a problem.
Do note that they enjoy moist, well-draining soil. So, if your garden has heavy soil like clay, do amend it with compost or dig up some of the soil and add sand underneath.
Perennial Geranium
Geraniums are an amazing flower because of their beauty. But, they can be confusing because there are so many different classifications to them. Each of these have their own characteristics.
And, in some cases, the groupings will tell you their ability to tolerate colder climates and other important features.
So, make sure that you’re getting perennial geraniums.
That said, perennial geraniums come in a wide array of colors, among them being blue. But, you can likewise go with purple if you want an offshoot shade of blue.
Other options include white and pink which are likewise pretty.
Viola
The Viola genus is comprised of over 500 different species. And, these plants come in all sorts of varieties including perennials and annuals just to name a few. So, if you want something that will come back year in and year out, go with a perennial.
That said, most garden violas fall under the a few types. This includes violets, pansies and johnny jump ups.
Yeah, I love the name of the last one as well!
Anyways, these are mostly small varieties. Interestingly, they’re edible, which isn’t often the case for many flowers.
They bloom later in the year when the weather is cooler.
Lupine
Lupine ( Lupinus x hybrida) are wildflowers. And, they bloom during the spring. The ones you see in the gardens and the ones I suggest you get if you choose to go with them are hybrids.
Because they’re “designed” as such, they have brighter, more vibrant colors. This makes them stand out in your garden.
You especially want their colors to shine because of their uniquely lovely shape. These stand almost upright and grow to about 3 or 4 feet high. They likewise reach up to 18 inches wide.
Blue Delphiniums
If you want a true bright blue color, check out the Blue Delphinium.
These are amazingly stunning flowers that have showy spikes. They’re perfect for summer as their colors are bright.
Of course, besides blue you have other options including pine, white and purple.
But, the blue ranks amongst the most popular for a reason, it’s catches your attention.
As beautiful as they are, they’ll also attract butterflies, hummingbirds and bees to your garden. They likewise make perfect specimens for cut flower gardens.
Felicia ‘Magic Blue Daisy’
Felicia Blue Daisies are just what they sound like.
They are blue in color and resemble daisies. This makes them amazingly beautiful to look at as you have the light blue petals surrounding the yellow center.
These are small flowers ranging from about a foot to about a foot and a half high. They are well-suited for warmer locations. Thus, prefer USDA Hardiness Zones 9 to 11.
That said, they’re easy to care for. And, you can grow them in garden beds, borders or containers without any issues.
They likewise do well in full sun or partial shade, which gives you a lot of options where to grow them.
Harvest Bells
Harvest bells (Gentiana saponaria) are unique looking perennials that have a wonderful blue color. Although, you might see some that are purple in color as well.
These are showy flowers that bloom late in the summer or early in the fall. As such, they complement most gardens whose blooms are already fading around these times.
Thus, adding them will allow your garden to always have some color to it.
Harvest Bells enjoy sunlight. Although, they’ll tolerate partial shade as well. They can grow to between 18 to 24 inches tall. And, they attract bees.
Veronica
Veronica plants are commonly known as Speedwells. They are flowering perennials that grow in clumps. Together they look lovely thanks to their showy spikes.
Their flowers are long lasting as well and bloom from late spring or early in the summer. And, they last till the end of summer.
They are very low maintenance and grow very easily. Getting to between 10 and 36 inches high, they are often used for borders and landscaping. Plus, they attract butterflies to your garden as well.
People often use them in cut flower arrangements.
