Blue wildflowers in the UK can be categorised by their first flowering month. While some species may overlap months or have a longer blooming period, the list below provides a general idea of when these flowers first appear.

It is important to note that factors such as climate, altitude, and geographical location can impact the exact timing of these flowers' first appearance. Additionally, some species may bloom earlier or later in response to changes in weather patterns or local conditions.

January

None

February

None

March

Speedwell (Veronica spp.)

There are over two dozen species of speedwells that grow in the UK, but they generally look fairly similar, with leaves that feature 'teeth' along the margin, but are not deeply divided. Leaves and stems and generally slightly hairy. Flowers of the more common species are small (8mm or so) and blue, with four petals. Some are more spectacular, such as Spiked Speedwell (Veronica spicata, final image), which grows on limestone rocks in scattered sites in England and Wales from July to September. A few of the speedwells, such as Persian Speedwell (Veronica persica), are some of the first flowers to appear in spring.

Siberian Squill (Scilla siberica)

A garden escapee, Siberian Squill (Scilla siberica) is a small, early-spring flowering bulbous perennial native to Siberia and Eurasia. It features delicate, nodding, bell-shaped, vibrant blue flowers with six petals and a yellow center. Grows up to 4-6 inches tall.

Wood Anemone (Anemone nemorosa)

Wood Anemone (Anemone nemorosa): Delicate, usually white or pale-pink flowers which are occasionally blue with six to eight petal-like sepals, and deeply divided, fern-like leaves. Flowers from March to May.

April

Forget-me-not (Myosotis spp.)

Forget-me-nots (Myosotis spp.), also known as Scorpion Grasses, produce clusters of tiny, delicate, five-petaled blue flowers with a yellow or white eye. There are about a dozen species in the UK.

Bluebell (Hyacinthoides non-scripta)

Bluebell (Hyacinthoides non-scripta): Bell-shaped, blue-violet flowers that droop in one-sided clusters, with slender, strap-like leaves; flowers from April to May.

May

Bugle (Ajuga reptans)

Bugle (Ajuga reptans): Spikes of tubular, blue-purple flowers with dark green, shiny, oblong leaves that form dense, creeping mats; flowers from May to June.

Green Alkanet (Pentaglottis sempervirens)

Green Alkanet (Pentaglottis sempervirens): Clusters of bright blue, star-shaped flowers, and rough, hairy, dark green leaves; flowers from May to July.

Viper's Bugloss (Echium vulgare)

Viper's Bugloss (Echium vulgare): Tall spikes of funnel-shaped, vibrant blue flowers with red stamens, and rough, lance-shaped leaves; flowers from May to September.

June

Common Milkwort (Polygala vulgaris)

Common Milkwort (Polygala vulgaris): Small, pea-like flowers in shades of blue, pink, or white, and narrow, linear leaves; flowers from May to August.

Tufted Vetch (Vicia cracca)

Tufted Vetch (Vicia cracca): Racemes of small, pea-like, bluish-violet flowers and pinnate leaves with tendrils for climbing; flowers from June to August.

July

Chicory (Cichorium intybus)

Chicory (Cichorium intybus), also called blue daisy: Bright blue, daisy-like flowers with toothed petals, and narrow, lance-shaped leaves; grows on waste-places and roadsides particularly in the North; flowers from July to October.

Devil's-bit Scabious (Succisa pratensis)

Devil's-bit Scabious (Succisa pratensis): Rounded clusters of small, tubular, lilac-blue flowers, with basal rosettes of elliptical, coarsely-toothed leaves; flowers from July to September.

Meadow Cranesbill (Geranium pratense)

Meadow Cranesbill (Geranium pratense): Large, saucer-shaped, violet-blue flowers, and deeply divided, palmate leaves; flowers from June to August.

August

Great Lobelia (Lobelia siphilitica)

Great Lobelia (Lobelia siphilitica): Tall spikes of tubular, two-lipped, bright blue flowers, and lance-shaped, serrated leaves; flowers from August to September.

Water Forget-me-not (Myosotis scorpioides)

Water Forget-me-not (Myosotis scorpioides): Tiny, sky-blue flowers with a yellow or white eye, and lance-shaped, green leaves; flowers from June to September.

Harebell (Campanula rotundifolia)

Harebell (Campanula rotundifolia): Delicate, bell-shaped, pale to deep blue flowers, with narrow, grass-like basal leaves and linear, stalkless upper leaves; flowers from July to September.

September

Autumn Gentian (Gentianella amarella)

Autumn Gentian (Gentianella amarella): Trumpet-shaped, deep blue or purple flowers with five petals, and opposite, linear leaves; flowers from August to October.

Autumn Squill (Scilla autumnalis)

Autumn Squill (Scilla autumnalis): Small, star-shaped, pale to deep blue flowers in loose, one-sided racemes, and narrow, grass-like leaves; flowers from August to September.

October

None

November

None

December

None