15 Best Blue Flowering Plants for a beautiful garden

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Are you looking for a blue plant for the garden? Here is a list of 15 of the best blue plants for the garden, their features, and growing conditions:


This is one of the best flowers for the garden and is suitable for zone three to nine. When mature, the plant reaches three to fifteen feet in height. These flowers do well under shade. However, depending on the intensity, you can grow these flowers in the sun.

You should expect hydrangeas to bloom in the summer, and their color is often in shades of blue, pink, purple, white, red, and green. The flower often presents one color, which changes as it ages. Also, the shade of the color depends on the soil type and pH levels.

Blue Hydrangea

There are six varieties of hydrangea, and they include:

  • Bigleaf or French
  • Oakleaf
  • Mountain
  • Smooth
  • Pinnacle
  • Climbing

Additionally, the flower has other features which would influence your choice. There are dwarf varieties, common shrubs, and tall tree-like forms. These flowers have different shapes: snowball, mophead, pinnacle, and lace.

As you choose to plant the flower, it is crucial to remember that its leaves are toxic and could be harmful to pets when ingested.

The best time for planting container-purchased hydrangeas is during spring or fall when it doesn’t threaten frost. You can plant the flower at a location that receives sun in the morning and shade later in the day.

You also need to remember the plant’s mature size and grow where it gets the required space to grow. Additionally, if you plant the flower under a shade, avoid planting under trees where they compete for food and sunlight.

Strong winds are also likely to snap the plant branches. Finally, hydrangeas also do well in fertile, well-drained soils.


Blue salvia

Salvias belong to the mint family and have close to over a thousand species. These include rosemary, thyme, basil, and lavender. Some of the ornamental salvias are used in culinary.

One advantage of planting salvias is that they are drought resistant and easy to maintain. They are, therefore, native to hot and dry climatic regions. Besides, you can grow them as perennials. If you plant these flowers, you should expect frequent visits from bees, butterflies, and hummingbirds.

Salvias grow to a height of one to six feet, and most varieties don’t do well in shades. Consequently, they require full sun (six hours) to blossom.

You should expect salvias to bloom from late spring to fall if you have grown salvias. The flowers come in shades of blue, dark purple, pink, red, white, lavender, and yellow. They also have narrow velvety leaves and square-shaped stems.

There are different varieties of salvias; some are annuals, and others are perennials.

Lily of the Nile

blue Lily of the Nile

These flowers, also called agapanthus, are perennials that bloom in mid or late-summer, producing white, purple, or blue flowers. They grow from rhizomes and are drought resistant. They retain their strappy green leaves throughout winter.

The plant grows to a height of six feet. There are, however, dwarf varieties that grow to 20 inches.

There are seven species, all named Lilly of the Nile. The flower is native to the mountains of South Africa and requires full sun.

Important to note is that these are not true lilies, and their leaves don’t contain the same toxicity lilies do. However, the same cannot be said about their roots or rhizomes.

Rose of Sharon

blue Rose of Sharon

This hibiscus plant is similar to the shrub althea that thrives in different climatic zones. The advantage of the Rose of Sharon is that you can overwinter the plant indoors at temperatures as low as 20° and below.

The plant grows to a height of eight to twelve feet in height. The flower blooms best in full sun, starting in summer and continuing through fall until the last frost.

To grow the Rose of Sharon, you must look for well-drained soils and use mulch to preserve the moisture. Also, planting it in spring or fall would be best.


blue Cornflower

The blue cornflower is also called bachelors buttons. It is one of the most grown blue flowers. Additionally, it is an annual plant that blooms between early and mid-summer. Its blooming can be extended with frequent deadheading. The growing conditions are full to partial sun, and grow to a height of one to three feet.

Grow the plant in a sunny spot with moderately fertile and well-drained soils. The plant also requires shelter from strong, drying winds. Additionally, you must provide the plant with a trellis, lattice, or fence to climb on.

Dwarf Morning glory

blue Dwarf Morning glory

This plant is closely related to morning glory, and its flowers are dainty true blue between early summer and the first frost. Though often grown annually, the dwarf morning glory is a perennial in zones ten and eleven. Dwarf morning glory grows to 12 inches, trailing two feet, and requires full sun to bloom.


blue Iris

This plant produces sapphire blue large ruffled blooms and comes in different sizes. Some are large, growing up to four feet, while others are short, with heights of six inches.

The Dutch variety of the iris grows to two inches in height and is about twelve feet wide. Finally, the tall bearded varieties grow four feet and two feet wide.

Most require full sun for most of the day to bloom. Other varieties grow well in partial shade, such as the Siberian iris and pacific coast natives. The plants don’t blossom when grown in shades.

There are two varieties of flowers: some are grown from bulbs, while others rise from rhizomes. The flower mainly occurs in lavender, yellow, purple, and white shades. Generally, their colors range from white to almost black.

You can plant the irises in late summer to early autumn, which allows the roots enough time to establish before the end of the growing season.

These plants are very toxic to pets when ingested. The plant’s bulb is the most poisonous part of the plant.


blue Lobelia

Lobelia is a perennial plant but is often grown annually. Also, it requires full sun to bloom.

This is a good choice if you are looking for a blue flower container plant. It produces tiny soft blue flowers in spring to the first frost. Additionally, this plant is drought resistant and grows best in sultry summer temperatures.


blue Gentian

There are over a thousand species of the plant. The gentian produces brilliant royal blue flowers. Moreover, the plant has attractive emerald green lance-shaped leaves. The flowers spring from the plant’s stem facing upwards from early midsummer to early fall.

For healthy growth, plant the flowers in full sun to partial shade. If your climate has hot, humid summers, there is a need to protect the plant from the afternoon sun.

Over the past centuries, people grew gentians for their medicinal properties. The plant is known as a medical herb and is used in flavoring liqueurs and beers. The plant is a medicine used to treat snake bites and remedy digestive disorders.

Love in a mist

blue Love in a mist

The plant bears this name due to its structure. It has a tangle of ferny, fennel-like foliage that forms a mist around the flowers.

This is one of the best for your garden due to its delicate blue color. For this reason, they are commonly used in fresh, cut, dried-out flower arrangements. Additionally, it has ferny foliage and ornamental seed pods. It is also an annual growing to a height of two feet.

The plant also blooms from spring to spring to early summer. It also requires full sun to bloom.


blue Brunnera

This plant is also called false forget-me-not, jack frost, Siberian bugloss, or heartleaf runner. The bloom time for the plant is as from late April to June. Also, you can grow the plant in partial sun to shade.

The plant grows well in shades and is highly admired for its beautiful foliage and tiny baby blue flowers. Additionally, the plant is a perennial and grows to a height of fifteen inches.

The plant grows well in well-drained soils and is not favored by saturated soils. For this reason, you should use only water soil to be just moist. Additionally, cultivating the ground will allow water to sit through without stagnating on the plant stem and leaves.

Globe Thistle

blue Globe Thistle

The spiky plant has golfball-sized flower heads that dominate gardens and floral arrangements. The flowers bloom later in the summer and resemble ornamental onions.

The plant is also a perennial growing in zones four to nine. It also grows to four feet and blooms from June to September. It doesn’t do well in shades, requiring full sun to bloom.


blue Delphinium

This plant produces beautiful blue flowers throughout summer. They present a compact growth and don’t need staking. Additionally, the plant is heat resistant and does well during hot summers.

Delphinium is a perennial plant that thrives well in zones three to seven. It grows to 18 inches blooming from late spring to summer.

You should grow the plant in the full sun for it to blossom

False Indigo

blue False Indigo

This plant is tough and resistant to dry and hot conditions. It blooms in late spring and summer, producing spires of indigo flowers. The plant stems are vase-shaped with blue-green foliage.

False indigo is a perennial growing in zones three to nine to a height of three feet. If you are growing the plant, expect blossoms from late May to July. For this to occur, the plant requires full sun. However, it is also tolerant to partial shade.



This is another compact shrub that is loved for its abundant flowering. The plant produces clusters of deep blue flowers late into the season (mid-summer to fall).

The flowers have a distinct fragrance and can last well into autumn, attracting pollinators like butterflies. Additionally, the plant grows well in zones five to nine to reach a height of three feet. This shrub does well in full sun.

FAQs on 15 Best Blue Flowering Plants for a beautiful garden

What is the rarest blue flower?

Grape Hyacinth is a lovely blue bulb-shaped flower that blooms in clusters in mid-spring.

What flowers are naturally teal?

There are no teal flower options available. Teal flowers can’t be found in the wild. Purple flowers include hydrangea, roses, lisianthus, stock, carnations, dendrobium orchids, irises, tulips, and larkspur.

Are Blue Zinnias real?

Blue zinnias, at least in our experience, are not real. We ended up with gold and crimson zinnias from the seeds we sowed. Someone must have recognized that gardeners like us would want to buy blue zinnias and thus photo-shopped the box to make the flowers appear blue.

Are blue flowers rare?

Besides the sky and water, blue is a rare color in nature. Blue blooms are uncommon, implying that it is difficult for plants to create such colors and that they could be a useful indicator of plant-pollinator fitness in a given habitat.

What blue flower means?

The blue flower was a prominent symbol of Romanticism’s inspiration and is still a popular subject in Western art today. Desire, love and the metaphysical quest for the limitless and unattainable are all represented by this symbol. It is a symbol of hope and beauty.

Conclusion on 15 Best Blue Flowering Plants for a beautiful garden

We have looked at some of the best blue plants for the garden, which you can try out. As you choose these plants, you should also consider their growth conditions. You will likely create your desired garden if all the factors are right.

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