G-H

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.

Helichrysum bracteatum is the most well known and is probably the best of all the everlasting flowers. They make one of the finest subjects for bouquets, apart from being useful for beds and borders. They are easy to cultivate and established plants grow well with little or no attention and bloom from mid-summer right up to frost.

Helichrysum make one of the finest subjects for beds and borders and for bouquets, the flowers bloom from mid-summer right up to frost. Deep purple-red blooms are held atop strong multi-branching bright green stems. Known as an 'everlasting', they make one of the best dried flowers, both the colour and shape will last indefinitely.

Helichrysum bracteatum is the cut flower grower's staple, producing tall vigorous branching plants that are filled with large papery flowers. The scarlet red flowers are perfect for cutting, they have a subtle silky sheen and are striking in all stages, from bud to fully opened.

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.

Heliopsis ‘Summer Nights' is a special selection made by Dale Hendricks of North Creek Nurseries, USA. Introduced in 2004 it produces a profusion of single blooms in early to mid-summer, with rich, deep golden-yellow petals and deep mahogany centres. The foliage is red-tinted and the stems are tinted dark burgundy.

Based on hybrids bred by the doyenne of the Hellebore world, Helen Ballard, these must be some of the finest and most beautiful of the race we have to offer. Large flowers are produced in a variety of colours from dark purple to white - often extravagantly mottled and marked.

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.

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.

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.

Dames Rocket was the favorite flower of Marie Antoinette. The genus name Hesperis is Greek for evening, a reference to this plant's aroma becoming ever more conspicuous towards evening. The fragrance is as sweet as a violet's. The night-scented stock is a close relative.

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.

Humulus lupulus, is a climbing hardy herbaceous perennial. The Hops are actually the female flower cones or 'strobiles' of the plant. Hops are used as a sedative and relaxant, sleeping on a pillow filled with hops is said to help insomnia. Leaves and shoots are eaten either cooked or in salads, the flavour is said to be delicious.

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.

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.

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.