Gardeners know it well, blue is a less frequent color than others in the floral field for reasons of pigments and D’alkalinity. It is therefore necessary to take the time to research a little if you wish to cultivate plants which are covered with flowers declined in a range of real blues, more or less intense, ranging from pastel blue to deep blue, enough to create sumptuous shades. Among these wonders, here are 12 plants whose flowers are blue, and whose flowering time varies from one variety to another. The good idea is to adopt them all to be able to punctuate your natural space with blue notes throughout the year.
2 blue flowering plants in the dead of winter
In winter the garden can be flowered if you take care to install a few plants in it. early flowering. Although the choice is more limited than in summer, some plants with blue flowers are a sensation in low temperatures.
- Hyacinth (Hyacinthus) comes in different colors including pure blue. It is a bulbous plant very easy to grow, with winter flowering, from December until February. Its star-shaped flowers exude a heady scent and powerful. It is installed in a pot for forced flowering in winter, but it can also be grown in the ground (beds, borders, rock gardens), where it flowers during the spring. It appreciates light, well-drained, loose soils but hates compacted soils. Placed in full light in a warm situation, it flowers well but can tolerate light shade.
- The Glory of the Snows (Chionodoxa luciliae) is a bulbous plant with an early blue flowering since it flowers from February until early spring. After flowering, it disappears completely to be better reborn during the following winter. Ideal in rockery or in the undergrowth, it likes cool, humus-bearing soils and shady exposures.
2 plants with blue flowers to honor the spring
There are a few azure flowering plants that turn the garden into a painter’s palette. From April to June we can appreciate among others:
- Rosemary whose tops enhance the flavor of dishes while giving them a decorative touch. It is grown in beds, isolated, in hedges but also in pots, on the terrace or balcony. He loves full sun.
- The Muscari (Muscari spp.) that we also call grape hyacinth is a hardy bulbous plant capable of withstanding -25 ° C which is planted in autumn to flower from March to May. Its bright blue flowers are shaped like a bells and emerge from a tuft of wrapped bright green leaves. Muscari appreciates cool, well-drained and fertile soils. He likes half-shaded to slightly sunny exposures. The bulbs are planted in groups to form pretty blue spots, in rockery, borders or clumps, but also find their place in a planter.
6 blue flowering plants that bloom in summer
- The Lark’s foot (Delphinium) which, depending on the variety, is annual or perennial, can reach 2.50 m in height. The smallest species, however, do not exceed 50 cm. It is essential in the garden if you want to create a magnificent shades of blue and bring a romantic note to your natural space. Easy to grow, it offers a real spectacle with its spears which bloom from June until the end of September. The very hardy perennials tolerate down to -30 ° C. It is a plant with blue flowers that it is installed sheltered from the wind, in the sun, in a soil that must always remain cool. Note that the Dolphinelles are herbaceous plants that come in a color palette that also includes pink, mauve and white.
- Agapanthus (Agapanthus) is a must in the garden, in the ground as in a large container. From June to August, it is adorned with blue inflorescences in umbels. It is a plant very graphic with its wrapped foliage and sumptuous flowers very popular with butterflies. She likes to be installed in the sun or under very light shade, in well-drained soil, especially in winter, and rich. There is also an Agapanthus with white flowers.
- Aconite (Aconitum napellus) works wonders from the height of its 150 cm with its flowers of a true blue carried by proudly erected poles. To be installed at the back of a bed, it is perfect for playing the verticality card. She likes shady situations and cool soils with lots of humus. But beware: the one we nickname Jupiter’s Helmet is as dangerous as it is beautiful. theAconitum napellus is one of the most poisonous plants due to the diterpene alkaloids contained in all of its organs. A simple contact is enough to cause serious poisoning because one of its alkaloids (aconitine) is absorbed by the mucous membranes and the skin. Handle with gloves, therefore, and keep out of the reach of children.
- Indigo Blue Clematis (Clematis integrifolia Durandii) is a beautiful climber of modest size which offers us flowers in the shape of bells of an intense blue color throughout the summer. In pots or in the ground, clematis is easy to grow. It likes cool, loose, rich, well-drained soils and semi-shaded areas.
- Cape Plumbago (Plumbago auriculata) is a Mediterranean sarmentose plant with delicate flowers Azure blue, grouped in clusters that we enjoy admiring year after year from June until frost. It is cautious to grow in the ground or in pots, which does not tolerate negative temperatures. It is therefore protected before the first frost with a wintering veil and a mulch is installed at its base or else it is overwintered in a frost-free room. Plumbago is ideal along a wall or a trellis. It likes slightly acidic, well-drained, loose and humus-bearing soils as well as very sunny positions.
- Blue Volubilis (Ipomoea indica) is a climbing plant ultra fast growing. The Blue Volubilis can reach 8 to 10 meters in height. We let it climb along a fence, a pergola, a trellis for the most beautiful effect. The ideal is to install it in a rich soil, not too compact and in full sun. Note that Volubilis is little rustic since it does not withstand temperatures below -3 or -4 ° C. It is only in regions with a mild climate that its flowering can be prolonged in autumn.
2 plants with blue flowers to brighten up the fall
What a pleasure to still have flowers in the garden long after the end of summer! Here are some species with blue flowers that bloom in the fall. In addition to those that can be admired from the month of June or July and until the frosts, that is to say when autumn is already installed, we can also be seduced by the following ones.
- The Céanothe ‘Automnal Blue’ is a shrub with bushy habit with evergreen foliage whose top of the stems is covered with a multitude of blue flowers from summer to autumn in regions with a mild climate where flowering is the longest. It can reach 2.50 m in height. It is preferably planted in limestone, light, cool and well-drained soil, in a semi-shaded to sunny area of the garden.
- The blue chrysanthemum is a sumptuous plant that does not find its place only in cemeteries. You can grow a very large collection of chrysanthemums to create a magical and colorful garden. But, as is the case in the floral world, blue is rare and does not exist naturally in chrysanthemums. This one is the result of a research work. It is a hybrid that benefits from the genes of Clitoria ternatea (a blue pea) and Campanula medium (a bellflower).
Do not hesitate to complete this collection of blue flowers, letting yourself be seduced by other varieties more nuanced tone, ranging from mauve to purple. These plants are much more numerous than those whose flowers are of a pure blue but one obtains in this way absolutely delightful variations.