Hardy Perennials

Related to Heuchera and Tiarella, Tellima grandiflora form a tidy clump of rounded leaves and are topped by lime-green airy spires. They make excellent groundcover, thrive in shade between flowers in a border and make a good filler for separating strong shapes or bright colours.

Summer-blooming spiky flowering plants - in garden design parlance ‘the verticals’. We all need some, and there are lots of contenders, but a plant that can go just about anywhere in the garden, cope with almost all situations and bloom with copious plush spikes over several weeks is a very rare treat.

Thalictrum aquilegifolium 'Purpureum' features a basal clump of lacy, blueish-green foliage topped by a hazy, fuzzy show of purple flowers. They produce a shimmering hazy effect in beds and borders wildflower gardens or meadows. Both leaves and flowers are good for flower arrangements.

Thalictrum lucidum is a less well known species of meadow rue, it sports luscious deep green, fern-like foliage. In mid-summer the plant is festooned with a superb array of fragrant flower stems, topped with airy puffs of soft cream flowers each with bright yellow stamens.

Thymus serpyllum is one of the most versatile groundcovers. Forming dense evergreen cushions of flowers these low maintenance plants don’t require mowing, watering or care, and can take a lot of abuse. Its leaves can be used as a culinary herb and its uses in the garden are almost unlimited.

Trollius europaeus is a beautiful native wild flower of Europe and Western Asia. Found in damp ground in shady areas, it is a most attractive plant with dark green, deeply cut leaves and bears flowers, best described as egg-yolk yellow in colour.

Valeriana officinalis is a graceful wildflower that is native to Europe and Western Asia. The tall, branched flower stalks are held atop a low mound of foliage, the densely clustered flowers are sweetly scented and usually white with a hint of pink.

One look at this species of Verbascum and you will realise why it is also called ‘Arctic Summer’. Tall, white, fleecy flower stems emerge from felted evergreen leaves in early summer. Its stems and leaves are covered in a silvery down that gives it an appearance of being permanently covered with frost.

Verbascums are statuesque in both foliage and flower. This elegant species, native to the Olympus mountains is arguably the finest of the genus. Tall flower spikes rise from the centre of the foliage, each are weighted heavily with bright, golden-yellow blooms giving the effect of an enormous candelabra.

Verbascum ‘Snow Maiden’ is an incredibly beautiful mullein that grow to just 36 to 48cm tall. With masses of soft white flowers each with delicate yellow filaments they flower in June and continue to appear over a long summer, often right through to September. Very easy to grow from seed.

The poise of the lovely Verbascum phoeniceum 'Flush of White' makes this plant a natural candidate for the front of the border, even though its height might suggest, that it should go at the back. In summer winds, which snap off delphiniums and toss sunflowers awry, the Verbascum stands defiant.

English gardeners are very familiar with this plant and consider it essential for a well-structured garden. Verbascum phoeniceum 'Hybrids Mix' flower freely, giving a glorious plethora of colours from delicate salmon to rich claret. A true perennial which can flower the first year given an early sowing.

Relatively new to cultivation Verbascum phoeniceum 'Violetta' is the smallest growing of the perennial Verbascums. Soundly perennial and drought tolerant it produces delicate flower spikes with whorls of tissue thin purple blooms that ascend to the finest point. It is by far the darkest flowered mullein available.

Veronica longifolia prefers a position in sun or part shade in moist well-drained soil. The sophisticated blue spires bloom in midsummer and last for several months. They make a strong vertical statement and are an excellent contrast to more traditional flowers shapes when positioned at the front of the border.

Gardeners are often looking for good solid perennials that will have attractive flowers, be easy to take care of, grow nicely but not take over the garden. One group of plants that should be considered is the Veronicas. They provide some of the clearest, truest blues in the perennial border.

To garden with an Oudolf-esque plant like Veronicastrum, it is not necessary to turn your outdoor space into a prairie: you are allowed to keep your flower beds. Naturalistic planting travels well, and Veronicastrum holds its own in a formal border as well as in the middle of a lawn which has turned into a meadow.

Viola cornuta 'Arkwright Ruby' is an antique variety that is a favourite among gardeners for both its historical charm and ornamental beauty. Incredibly versatile, they are perfect for almost anywhere in the garden and even for the vase. With its long stems and long flowering season, it will deliver a vibrant splash of colour in any garden.

Viola cornuta ‘Back to Black’ is a striking cultivar of the horned violet, admired for its exceptionally dark, velvety flowers. The blooms are an intense black-purple, so deep that they often appear pure black. If you want to achieve long stems for the vase, plant them close, 5 to 10cm apart.