What are some blue flowers? (with photos)

A blue hydrangea flower.

A number of flowers, shrubs and vines have blue flowers or bluish foliage. You can use blue flowers to create an all-blue garden, which can be quite impressive, or as accent color blocks in a garden. When choosing blue flowers for your garden, you should go see them in person if possible, as shades of blue vary widely, and you might be surprised at the hues of some flowers. It’s also a good idea to look for plants that are hardy in your region of the world: the lily of the Nile, for example, is a beautiful blue flower, but it needs a warm climate to thrive.

Chicory plants have blue flowers.

Several bulbs have blue flowers or cultivars with blue flowers. Irises, hyacinths, amaryllis and bluebells are some examples of blue bulbs. It is also sometimes possible to find blue-violet tulips, although true blue tulips have not yet been bred. Some examples of blue flowering annuals include: petunias, lobelias, ageratum, single buds, Nigella, larkspur, blue fringed daisies, cornflowers, lupines, Evolvulus, and blue poppies. Some of these plants come in a variety of shades, so it’s important to look specifically at blue cultivars. If you have a pond or pool, you can also use blue lotuses and various blue water lily cultivars.

Nigella flowers are a type of blue flower.

The foundation of a garden is often its perennials, the plants that are present year-round. Blue annuals are quite diverse, including: Salvia, Campanula, Veronia, statice, delphiniums, violets, blue flax, Baptisia, Caryopteris, Russian sage, spiderwort, forget-me-not, holly, Platycodon, leadwort, geraniums, asters, Amsonia, phlox, chicory, blue-eyed grass and blue mistflowers. Some of these plants will behave as annuals rather than perennials in colder climates where wintering can become very intense.

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Groundcovers like blue star vine, ajuga and periwinkle can provide a blanket of foliage and delicate blue, while vines like clematis, wisteria and blue morning glory can be trained on trellises and fences. Blue flowers also grow on shrubs such as lilacs, some hibiscus cultivars, Vitex, butterfly bushes, and hydrangeas.

All these blue flowers have different water, soil and sun requirements. It is a good idea to group together plants with similar requirements, to promote healthy growth in the garden and to facilitate garden maintenance. If you live in an extremely cold, hot, humid, or dry climate, you may have trouble growing some of these blue flowers, although most of them thrive in temperate climates.

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