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Rosularia is a rosette forming succulent that closely resemble other Crassulaceae such as Sempervivum and Echeveria. It distinguishes itself in spring time when the small green clusters change to a vibrant rich reddish tone. Rare yet hardy, they are seldom seen other than in specialist nurseries or rock garden collections.

Sagina subulata is one of the best low growing ground covers. Irish moss is most often used as a ground cover, softening paths and stepping-stones. It gives a lush accent to rock garden and terraces. For a luxurious carpet of green, few plants can match Irish Moss.

Salvia farinacea ‘Fairy Queen’ is an attractive new variety that bears multiple spikes of bicolour blue and white flowers on dark distinctive flower stems from June to October. With a bushy, compact habit and thick stems. A small white spot on each sapphire blue flower creates the illusion of fairy dust.

Salvia Victoria White is a companion to the more well known Victoria Blue. Flowering in less than four months from seed, it produces its white flowers from summer to autumn. Like all Salvia, it brings butterflies into the garden by the dozen, and makes a wonderful cut or dried flower.

Salvia patens is undoubtedly one of the very best blue flowering plants, the large, double-lipped blossoms are one of the truest blues found in nature. 'Blue Angel' is one of the smallest of the 'Gentian Sages', there is little else that can compete with the richness of its colour.

Salvia sclarea var. turkestanica 'Vatican White' is a choice white cultivar that is not that easy to find. A nobly architectural Sage, each of its branched stems is topped with a profusion of blossoms with brilliant white bracts. The flowers are attractive and are boosted in impact by the large petioles that surround them.

This hardy biennial Sage has been grown in almost every botanical sanctuary in human history and has many plus points: it grows well in poor soil resists slugs and other beasties, and doesn’t slump or need staking. It copes well in sun or light shade and the blooms are a magnet for bees and butterflies.

Salvia verticillata 'Purple Fairy Tale' is a spectacular first year flowering perennial. The irresistible deep purple petals gather like raindrops in tiered pools to form whorled flowers. Easy to grow, it will begin to bloom just a couple of months after sowing. The plant flowers abundantly and continues right through to September

Salvia x superba 'Blue Queen' is one of the finest Salvias we know. This plant is a spectacular source of dark, intense colour and narrow, vertical form. Masses of pencil-thin, vibrantly colourful bloom spires, so densely set that they present a solid wall of colour in the border.

The royal sister of ‘Blue Queen’, ‘Rose Queen’ is a wonderful, long-blooming cultivar with slender spires and beautiful mulberry-rose flowers, which open from dark pink buds in early and mid-summer. This tall, easy-to-grow variety with lance-shaped green leaves possess a pleasant aromatic scent.

Sanguisorba menziesii instantly catches the eye in the garden. With dense clusters of deep red, fat wiggly caterpillar shaped flowers and blue-green rounded leaves on gently arching stems, the colouring harmonises beautifully together.

Sanguisorba officinalis is a native of Europe and an old-world herb that is currently enjoying a resurgence in popularity thanks to the revival of interest in perennial gardens and naturalised form of planting. Perfect for natural style planting schemes, it looks right at home in a swaying sea of grasses.

This Japanese species of Burnet has infiltrated our psyche and somehow manipulated us so that we can find no fault with this most refined of perennials. Flowering in the first half of summer, the highly tactile flowers float like dainty ghosts at the tips of their slender stems.

Santolina, commonly known as Lavender Cotton is a small shrub with soft, woolly, finely divided foliage, that make neat, rounded bushes. They are valuable for mass planting, ideal for knot gardens and small hedging around herb gardens etc. It will stand any amount of clipping and shaping - a perfect plant for control freaks.

Cleanliness is next to godliness even in history. For centuries Saponaria officinalis has helped keep us clean while providing a little loveliness in our gardens. The flowers are an important nectar source and emit a pleasant and intriguing clove-like scent, seducing both night moths and butterfly species.

Saxifraga x arendsii 'Purple Robe' are compact, free-flowering, and easily raised from seed. These charming perennials quickly form an evergreen verdant mat. Excellent as alpine plants for a rockery or trough, use them spilling over low walls, as a path edging or green roof.

Boasting the most desirable of deep blue flowers, Scabiosa ‘Oxford Blue’ is a reselected form that stands out from other varieties. The large, domed, dark centred cushions with contrasting white 'pins', bob atop strong stems. A prodigious bloomer, they will supply you with excellent cut flowers.

Scabiosa atropurpurea is one of the longest-flowering and most glamorous of flowers that you can grow from seed. Easy to grow and fast to flower, this invaluable plant will attract many butterflies and bees to the garden and the long, straight stems will supply you with cut flowers throughout the season.

A prodigious bloomer and a tough, hardy garden performer Scabiosa atropurpurea grows quickly and is fast to flower. Rose-pink petals surround a domed, dark centred cushion, this invaluable plant will attract many butterflies and bees to the garden and would look as happy in a wildflower meadow as in a manicured border.