15 Best blue Flowering Plants for a beautiful garden


Blue flowers are some of the rarest flowers on the planet. In fact, of all the 280,000 existing flowers, only ten percent are blue. Blue-colored flowers arouse deep feelings and emotions of inspiration, love, and desire.

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:

Hydrangea

Blue Hydrangea

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 a shade. However, you can grow these flowers in them in the sun, depending on the intensity.

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.

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, standard shrubs, and tall tree-like forms. These flowers also occur in 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 keep in mind the mature size of the plant and grow where it gets the required space to grow. Additionally, if you choose to 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.

Salvia

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.

If you have grown salvias, you should expect them to bloom from late spring to fall. 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 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 20inches.

Collectively there are seven species, all going by the name 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 is a hibiscus plant 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. Additionally, the flower blooms best in full sun, starting in summer and continuing through fall until the last frost.

If you intend to grow the Rose of Sharon, you will have to look for well-drained soils and use a mulch to preserve the moisture. Also, it would be best if you planted it in spring or fall.

Cornflower

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 it grows 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 need to provide the plant with a trellis, lattice, or a 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 a height of 12 inches, trailing two feet, and requires full sun to bloom.

Iris

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, there are the tall bearded varieties that grow four feet tall 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 the flower: some are grown from bulbs while others grow from rhizomes. The flower mainly occurs in shades of lavender, yellow, purple, and white. 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.

Lobelia

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.

Gentian

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 as from early midsummer to early fall.

For healthy growth, plant the flowers in full sun to part 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. As a medicine, the plant is 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 and 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.

Brunnera

blue Brunnera

This plant is also called false forget-me-not, jack frost or 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 it grows to a height of fifteen inches in height.

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 plant is spiky with 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 a height of four feet and blooms from June to September. It doesn’t do well in shades as it requires full sun to bloom.

Delphinium

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 a height of 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 through to 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.

Bluebeard

Bluebeard

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 such as 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.

Conclusion

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 conditions of growth. If you get all the factors right, then you are likely to create the garden you desire.

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Tony O'Neill

I am Tony O'Neill, A full-time firefighter, and professional gardener. I have spent most of my life gardening. From the age of 7 until the present day at 46. My goal is to use my love and knowledge of gardening to support you and to simplify the gardening process so you are more productive

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