Hardy Perennials

Many gardeners look for easy to grow, reliable perennials that provide a bright, cheerful display of colour early in the season. Geum coccineum ‘Borisii-Strain’ flowers the first year from seed producing wonderful vivid orange-red toned flowers from late spring into summer.

Geum rivale, the Water avens is a native perennial of slow-draining or wet soils. Flowering prolifically it is particularly useful in damp soils and makes a good show besides ponds. It produces both nectar and pollen and is an excellent plant for attracting pollinators and amphibians to the garden.

If there's one plant that can inject a little razzle-dazzle into the border during gloomy late summers it is Helenium. From late July 'Helena' blooms with masses of vibrant blooms in a spectrum of rich colours from gold to mahogany red. Perfect for the back of the border and wonderful for cutting.

Helenium hoopesii is considered by some to be the most valuable of the species. It blooms with bright golden yellow disk florets that each form a kind of rounded knob that transforms the flower from your typical two-dimensional daisy into something much more interesting and sculptural.

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.

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.

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 is a great plant for the busy home gardener. ‘New Hybrids' is a selection of the newest forms, they will bloom the first year from seed with a profusion of blooms in shades in lemon, golden yellow and orange-yellow. The plants will produce arm loads of flowers all summer long and never once ask for decent soil or proper care.

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.

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.

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.

Iris bulleyana is a classic species Iris from western China. It belongs to a small group of oriental species which are entirely hardy and are of great value to the gardener. The plants are successful in any moist garden soil. Flowering from June to July, the blooms with mid purple flowers and dark purple veins.

Iris versicolor is one of the few species in garden cultivation. Although happiest at the waterside the plants will also perform well under average to moist border conditions. Flowering from May through to July, each stalk produces up to five violet-blue flowers with ruffled petals and bold purple veining.

'Kermesina' is an attractive and popular cultivar of Iris versicolor. Flowering from May through to July with claret-purple flowers with ruffled petals and bold purple veining. It may be grown in shallow standing water or moist shoreline soils and suitable to be grown in constantly moist humusy soils of a border.

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.

Knautia macedonica has been hugely fashionable for years and is likely to remain so for many more. This lovely and versatile perennial blooms from late spring to autumn with dark-crimson, richly glamorous pompoms. Established plants produce literally hundreds of blooms in one season.

'Melton Pastels' is a great border plant, densely flowering plant with strong stalks of pin cushion flowers in shades of shades of pink, cherry red, mauve and purple. The tall stems make excellent cut flowers and are good for the middle of the border, giving a succession of blooms through till autumn.

The Kniphofia hybrids have extended both the flower colour and height range. The usual fiery reds and oranges work particularly well in a planting scheme based on 'hot' colours - use them to light up sultry August borders. The cooler yellow, cream, ivory and sometimes green flowers is more restful.