April

Knautia arvensis is an attractive native perennial herb of well drained grassland. It can be found throughout Europe in meadows, rough pasture, hedgerows and verges. Though it is by nature a perennial, it will flower and produce seed the first year if grown as an annual, either autumn or spring sown.

Ipomoea 'Kniolas Black' is one of the darkest of all Ipomoea varieties available. It blooms with the most stunning dark velvety purple-black flowers, each with cerise throats. Very easy to grow, this extremely carefree and free-blooming climber will bloom early and load itself with masses of attractive dark purple-black flowers all summer long.

This heirloom morning glory originated in Bavaria in Germany and named for the original Seed-saver Baptist John Ott, Ipomoea purpurea 'Grandpa Ott' flowers of intense violet-blue, with a ruby red star. It is a good climber for walls, trellis work or if allowed to scramble through other plants or trees.

Ipomoea pennata is undoubtedly one of the most beautiful of all annual vines. The feathery foliage with thin, thread-like leaves give the plant a light, airy texture. In summer the plants burst into flower and are covered with hundreds of scarlet red, star shaped flowers.

Ipomoea nil ‘Blue Picotee’ produces large, ruffled cobalt-blue blooms that are edged with bright white surrounding a deep rose throat. This extremely carefree and free-blooming, annual climbing vine will grow to around 120 to 180cm (4 to 6ft) tall. It will bloom early and load itself with masses of attractive funnel shaped flowers up to 10cm (3in) wide all summer long.

Throughout the summer, large, pure white flowers of Ipomoea alba open quickly at night, releasing sweet perfume into the evening air. Position near to your patio where you can enjoy the fragrant scent in the evening. A wonderful plant for a moth, night, or fragrance garden, the large white blooms appear to illuminate the garden

Hyssop is a strong-flavoured aromatic herb which is enjoying a revival with home gardeners. An ideal plant for use in containers or as a low hedge or border within the herb garden. Highly attractive to bees, it makes excellent honey and is a must for any wildflower garden.

Hyssop, once recognised as a medicinal herb is enjoying a revival with home gardeners. An aromatic herb similar to rosemary or lavender, it makes an excellent low hedge and more unusual alternative to box. The plants are a dark, vibrant green with a spiky, upright habit and narrow tongue-like leaves. 'Pink' Hyssop sports vibrant, pink flowers.

Hyssopus officinalis 'Alba' is a much less well known variety of hyssop. Also known as 'White Hyssop' the plants sport bright white flowers from July to October. Widely used as a 'taste enhancing' herb or wildlife plant, the plants are a dark, vibrant green with a spiky, upright habit and narrow tongue-like leaves which have a peppery scent when stroked.

A deep blue carpet of bluebells is an unforgettable sight to anyone visiting many of our native woodlands. The spring spectacle of seeing a wood not only greening, but also 'blueing' is one of the joys of the year. When bluebells are in flower, spring has truly arrived.

Hosta are grown predominantly for their outstanding foliage, from leaves as small as a teaspoon up to those larger than a dinner plate, colours range from deep blues to silvers, darkest shiny greens to bright yellows, from a single solid hue to the myriad of variegations the choice is almost overwhelming.

In spring, Dame’s Rocket lights up the woodland edges with her blossoms, providing nectar for hummingbirds, moths and butterflies, and fragrance for the soul. Very easy to grow, sow seeds directly where they are to flower in early summer.

Dames Rocket produce flowers varying in colour from deep rich purple, through all the paler lilac shades to white. Highly attractive to bees and other beneficial insects, the fragrant flowers perfume the air in late spring and early summer evenings.

Gorgeously scented pure white flowers are held above rosettes of dark green leaves. Like all sweet rockets it is highly attractive to bees and other beneficial insects, the fragrant flowers perfume the air in late spring and early summer evenings. The night-scented stock is a close relative.

Herniaria glabra is a relatively unknown perennial that deserves to be used more often in our gardens. The nursery industry calls it ‘Green Carpet’ and well they should. This lovely bright green creeper spreads effortlessly in all directions. An excellent choice for between flagstones or as a lawn substitute.

From the Tian Shan Mountains of northern China comes this tough little subshrub that is among the finest expressions of silver foliage to be found. Helichrysum thianshanicum is a superb silver leaved evergreen, subshrub that forms a tight mound of eye-catching silver foliage.

Most gardeners are familiar with the annual sunflower, however, it is the perennial varieties that coexist most happily with other garden plants. Helianthus mollis is a lovely perennial with butter-yellow flowers. It grows 120cm tall and requires little more attention than an annual cutting to the ground.

Perennial sunflowers typically don’t grow quite as tall and large as their annual friends. However Helianthus maximiliani is a wonderful exception. It grows slowly through the summer months as a group of short stems, until late summer when the stems bolt and the flowers head for the sky.

Helianthus ‘Vanilla Ice’ is one of the prettiest sunflowers varieties available. With clusters of delicate pale creamy-yellow flowers with dark chocolate centres this compact variety grows to just 120 to 150cm (4 to 5ft) tall is suitable for the border or can be left add a naturalised charm to a wildlife friendly garden.