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30 Popular Types of Blue & Violet Flowers for Your Garden (A to Z)

Different types of blue and violet flowers.

Here are 30 of the most popular types of blue and violet flowers. While not the same, blue and violet are pretty close in color.  Violet leans towards purple and blue is blue.  We combined them in one post because in many cases it's a close call whether a flower is actually blue or violet. I love the coolness of blue and violet flowers.  They cool down hot colors such as red, yellow and orange.  They juxtapose those hot colors in a garden beautifully.   

While not the same, blue and violet are pretty close in color.  Violet leans towards purple and blue is blue.  We combined them in one post because in many cases it’s a close call whether a flower is actually blue or violet.

I love the coolness of blue and violet flowers.  They cool down hot colors such as red, yellow and orange.  They juxtapose those hot colors in a garden beautifully.  Here are 30 of the most popular types of blue and violet flowers.  Enjoy.

Agapanthus

Blue agaphantus in a garden.

Scientific Name: Agapanthus africanus

Type: Perennial

Sun: Full Sunlight

Water Needs: Moderate – especially during the growing season

Hardiness Zones: 8 to 10

Soil: pH 5.0 – 7.0

Blue Delphiniums

Bright-colored and healthy Blue Delphiniums.

Scientific Name: Delphinium

Type: Hardy Perennial

Sun: Full Sun or Partial Shade

Water Needs: High – soil should not dry out

Hardiness Zones: 3 to 7

Soil: pH 6.5 – 7.0

Brunnera

Brunnera has small, blue-colored flowers.

Scientific Name: Brunnera macrophylla

Type:  Perennial

Sun: Shade or Partial Shade

Water Needs: Moderate – keep moist until established

Hardiness Zones: 3 to 8

Soil: pH 5.5 – 6.0

Calla Lily

Calla Lily with a deep, violet color.

Scientific Name: Zantedeschia

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: High – the area should be watered well once planted

Hardiness Zones: 8 to 10

Soil: pH 6.0 – 6.5

Candytuft

Candytuft with colors ranging from light to dark purple.

Scientific Name: Iberis pruitii

Type: Perennial

Sun: Partial Sun to Full Sun

Water Needs: Moderate

Hardiness Zones: 4 to 8

Soil: pH 6.0-7.5

Canterbury Bells

Canterbury Bells has blue, bell-shaped flowers.

Scientific Name: Campanula medium

Type: Biennial

Sun: Full Sun or Partial Shade

Water Needs: High – needs to be watered regularly

Hardiness Zones: 4 to 10

Soil: pH 6.0 – 7.0

Cattleya Orchid

Violet Cattleya Orchid seen in the forest.

Scientific Name: Cattleya

Type: Perennial

Sun: Full Sun

Water Needs: Low

Hardiness Zones: 10 to 12

Soil: pH 5.5 – 6.5

China AsterChina Aster has unique and violet petals.

 

Scientific Name: Callistephus chinensis

Type: Annual

Sun: Full Sun to Partial Shade

Water Needs: Moderate – enough amount but do not water during heavy rainfalls

Hardiness Zones: 1 – 10

Soil: pH 5.1 -7.5

Columbine

Columbine with a color ranging from dark blue to violet.

Scientific Name: Aquilegia

Type: Perennial

Sun: Partial Sun or Shade

Water Needs: High – until well-established

Hardiness Zones: 3 to 8

Soil: pH  6.0 – 7.0

Common Comfrey

A close-up shot of a Violet Common Comfrey.

Scientific Name: Symphytum officinale

Type: Perennial

Sun: Full Sun

Water Needs: Moderate

Hardiness Zones: 4 to 9

Soil: pH 6.0 – 7.0

Coneflower

Violet coneflowers looking great in a garden.

Scientific Name: Echinacea Purpurea

Type: Perennial

Sun: Full Sun

Water Needs: High – especially during the Summer season

Hardiness Zones: 3 to 9

Soil: pH 6.0 – 7.0

Cornflower

Cornflowers with bright, royal blue petals.

Scientific Name: Centaurea cyanus

Type: Annual

Sun: Full Sun

Water Needs: High – needs to be watered in a regular and constant basis

Hardiness Zones: 2 to 11

Soil: pH 5.5 – 7

Cosmos

Cosmos with fresh and bright reddish-purple shade.

Scientific Name: Cosmos

Type: Annual

Sun: Full Sun

Water Needs: High

Hardiness Zones: 3 to 10

Soil: pH 6.5 – 7.0

Cyclamen

Cyclamen with thin and violet petals.

Scientific Name: Cyclamen persicum

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: Moderate

Hardiness Zones: 5

Soil: pH 6.5 – 7.0

Dendrobium Orchid

A purple Dendrobium Orchid looking fresh and healthy.

Scientific Name: Dendrobium

Type: Perennial

Sun: Full Sun – but not direct sunlight

Water Needs: Low – water every 1 to 2 weeks

Hardiness Zones: 11

Soil: pH 4.5 – 5.0

Empire Blue (Summer lilac)

A butterfly in a fresh, summer lilac shrub.

Scientific Name: Buddleia davidii

Type: Shrub

Sun: Full Sun

Water Needs: High – when in growth

Hardiness Zones: 5 to 8

Soil: pH 5.5 – 7.0

Flax

Blue flax with detailed petals.

Scientific Name: Linum usitatissimum

Type: Annual

Sun: Full Sun

Water Needs: Moderate – frequent but light watering

Hardiness Zones: 3 to 9

Soil: pH 6.0 – 6.5

Forget-Me-Nots

Forget-me-nots have small and attractive blue flowers.

Scientific Name: Myosotis scorpioides

Type: Biennial

Sun: Partial Shade

Water Needs: Moderate

Hardiness Zones: 5 to 9

Soil: pH  6.0 – 7.0

Foxgloves

Foxglove is a bell-shaped flower in color purple.

Scientific Name: Digitalis purpurea

Type: Biennial

Sun: Partial Shade

Water Needs: Moderate – water once or twice a week

Hardiness Zones: 4 to 10

Soil: pH 4.5 -8.3

Gentians

Gentian Flowers bloom in an intense blue shade.

Scientific Name: Gentiana verna

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: Moderate

Hardiness Zones: 4 to 7

Soil: pH 5.0 – 7.5

Globe Thistle

Globe thistles are blue, globe-shaped flowers.

Scientific Name: Echinops ritro

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: Moderate

Hardiness Zones: 3 to 9

Soil: pH 5.5 – 6.0

Grape Hyacinth

Grape Hyacinths produce small bundles of blue blossoms.

Scientific Name: Muscari

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: Low to Moderate

Hardiness Zones:  4 to 8

Soil: pH 6.0 – 7.0

Hydrangea

Hydrangea has a big head composed with a bunch of smaller flowers.

Scientific Name: Hydrangea macrophylla

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: High

Hardiness Zones: 4 to 8

Soil: pH 5.5 – 6.5

Iris

Dark violet flowers with yellow details.

Scientific Name: Iris sibirica

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: High

Hardiness Zones: 3 – 9

Soil: pH 6.8 – 7.0

Lisianthus

Lisianthus flowers have a resemblance to rose but it comes with deep purple shades.

Scientific Name: Eustoma Grandiflorum

Type: Perennial

Sun: Full Sun

Water Needs: Moderate

Hardiness Zones: 9 – 11

Soil: pH 6.5 – 7.0

Lupine

Scientific Name: Lupinus

Type: Perennial

Sun: Full Sun

Water Needs: High

Hardiness Zones: 3 to 9

Soil: pH 6.8 – 7.2

Sea Thistle

Blue Sea thistles have spike-like flowers.

Scientific Name: Cirsium japonicum

Type: Perennial

Sun: Full Sun

Water Needs: Low

Hardiness Zones: 5 to 9

Soil: pH 6.0 – 7.8

Siberian Squill

Siberian Squills have natural and fresh-looking blue blossoms that are small in size.

Scientific Name: Scilla sibirica

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: High

Hardiness Zones: 2 to 8

Soil: pH 5.6 – 7.8

Veronica

Veronica are small-sized flowers with light-blue tones.

Scientific Name: Veronica

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: High

Hardiness Zones: 4 to 11

Soil: pH 5.5 – 7.0

Waxflower

Waxflowers range from deep purple to bright magenta tones.

Scientific Name: Chamelaucium

Type: Perennial

Sun: Full Sun or Partial Shade

Water Needs: Moderate

Hardiness Zones: 9 to 11

Soil: pH 6.0 – 6.5

FAQ

Are blue flowers natural? Real?

Blue flowers are perfectly natural and real. They are found in most places all over the world and are often the first flowers to blossom in spring. However, if a person wants to get technical, blue flowers are not real at all. That’s because their blue color is partially a trick of the light, much like the blue feathers of the blue jay is a trick. What gives a blue flower its color is not blue pigment, but minerals, other types of pigments and the slant of the light.

Are blue flowers rare?

Blue flowers are not that rare though they are challenging for a plant to produce. Because of that, there are many types of plants that simply don’t produce blue flowers. The most notorious flower that won’t naturally appear in a shade of true blue is the rose, though lavender specimens are available. Blue daylilies and chrysanthemums are also hard to find.

Can you buy blue flowers?

Blue flowers can be bought at any florist’s shop, gardening center or online. They come in a great variety of shapes and sizes and can be just the thing for floral arrangements, garden plants or houseplants.

What do blue flowers represent?

The blue flower in general represents love, desire, hope and striving for the sublime and unattainable. The meaning of a blue flower also depends on its species. The elusive blue rose symbolizes immortality and royalty. The blue hydrangea is a gift for a fourth wedding anniversary. Conversely, it is a sign that a wedding proposal has been turned down. Blue hydrangea also symbolizes beauty and prosperity.

Bluebells symbolize constancy and humility while the larkspur represents lightheartedness. The lilac symbolizes youthful joy. The grape hyacinth is one of the first flowers to bloom in spring and so represents rebirth and sincerity. Blue asters stand for peace and elegance, and forget-me-nots, of course, symbolize remembrance.

Which trees have blue flowers?

In contrast to herbaceous plants, trees that have blue flowers are truly rare. One tree whose flowers come closest to blue is the Empress tree, Paulownia tomentosa, which is native to China. This tree has beautiful, fragrant, blue violet flowers that blossom before the leaves. The wisteria, which can sport masses of blue to purplish flowers, is sometimes grown as a tree even though it’s a woody vine and needs a strong support to twine around.

What makes hydrangea flowers blue?

Interestingly, the hydrangea’s blue color is a result of the pH level of the soil. The more acidic the soil, the bluer the flower. If the soil is more alkaline, the flowers tend to be pink.

How do blue flowers lure bees?

Bees are lured to blue flowers because blue flowers tend to have a lot of nectar. But since most flowers are other colors, some plants have evolved a blue or ultraviolet halo around their flower petals even if those petals are yellow, white or red. Humans can’t see ultraviolet, but bees can and so are drawn to the flowers.

What blue flowers do butterflies like?

Butterflies prefer flowers that are sturdy enough for them to rest on while they collect nectar. Therefore, the blue flowers most likely attract butterflies include chicory, sea holly, butterfly bush, butterfly flowers, borage, agapanthus and aster. Other blue flowers attractive to butterflies are hollyhocks, blue lobelias, pincushion flowers, phlox and bluestar.

Do any cacti or succulents have blue flowers? If so, what are they?

Cacti or succulents with blue flowers are about as rare as trees with blue flowers, but one cacti that has flowers that lean more towards blue than red or yellow is the Coryphantha ramillosa. This cactus is native to Mexico and into Texas. It grows on limestone at high elevations and produces a spectacular flower that can be described as lavender.

Another cactus with a showy lavender flower is C. vivipara, or the Spiny Star. This cactus is unusual because its range extends from Alberta, Canada and down into Arizona and Texas. The flowers are one to two inches across. In some varieties the cactus blooms many times a season, while in others it only blooms one or two days out of the year.

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