Juncus effusus (soft rush) £24.99
Position: full sun or partial shade Depth of water: 0-8cm (0-3in) Rate of growth: average Flowering period: June to August Flower colour: insignificant brown flowers Hardiness: fully hardy Commonly found on damp moors and grassland, this perennial makes a fine addition to the margins of a pond. The upright stems are dark green and in summer are accompanied by tight clusters of small brown flowers. Wonderful for adding vertical interest beside water, it will also grow in pots and containers provided there is reliable moisture. Garden care: From mid-spring to early summer lift and divide congested colonies.

Hebe buxifolia (shrubby veronica) £12.99
Position: full sun or partial shade Soil: moist, well drained and fertile Flowering period: June – July Hardiness: frost hardy (may need protection in colder winters) Small, bright green leaves clothe the upright stems creating shapely domes that help add structure throughout the year. From early summer, white or pale lavender flowers appear in short spikes, creating a soft haze of colour. Garden care: Needs minimal pruning. Remove misplaced or frost damaged branches in late spring. Protect from severe winter weather.

Dianella revoluta Little Rev (‘Dr5000’) (PBR) (flax lily) £9.99
Position: full sun or light shade Soil: humus-rich, well drained, neutral to acidic soil Rate of growth: average Flowering period: June to July Hardiness: frost tender (will need protection in winter) An exotic looking evergreen perennial that forms erect clumps of grass-like foliage. In early summer, urpight stems carry open clusters of star-shaped (usually blue) flowers, which are followed by fleshy berries. An architectural gem that is prefect for adding vertical interest to the front of a sheltered border, or for making a smart statement in a patio pot. Garden care: Avoid excessive winter wet and protect it from hard frosts. In all but very sheltered gardens, this is best grown in a pot, so it can be moved to an unheated greenhouse during winter.

Euphorbia rigida (spurge) £9.99
Erect, then spreading stems of fleshy grey-green leaves punctuated from early spring to early summer with small, yellow flower-heads. The prostrate stems of this sun-loving spurge look brilliant cascading over the edges of a raised bed or a rock garden outcrop. Position: full sun Soil: well-drained garden soil Rate of growth: slow to average Flowering period: March to July Flower colour: yellow Other features: fleshy grey-green leaves Hardiness: frost hardy Garden care: Split and divide large clumps in late autumn. When working with spurges always wear gloves since the milky sap is poisonous and a potential skin irritant. Goes well with: Eryngium variefolium, Euphorbia characias subspecies wulfenii ‘Blue Wonder’, Euphorbia schillingii, Cerinthe major ‘Purpurascens’, Gysophila paniculata ‘Bristol Fairy’ , Echinops ritro

Ballota pseudodictamnus (ballota) £9.99
Position: full sun Soil: poor, well-drained soil Rate of growth: average Flowering period: May and June Flower colour: white or pinkish-white Hardiness: fully hardy (borderline) Whorls of white or pink-tinted flowers appear in May and June on woolly stems above the mounds of yellow-flushed grey-green leaves. This upright, woolly-stemmed subshrub looks great in a sunny, well-drained gravel garden, surrounded by other drought-loving plants. Closely related to the ‘false dittany’ traditionally used for lighting oil-lamps in Crete, it may not survive in areas with cold, wet winters. Garden care: Cut back in early spring to retain a neat, compact shape. Avoid overwatering, particularly in winter.

Sporobolus heterolepis (Prairie dropseed) £9.99
Position: full sun Soil: tolerates most, but happiest in light, fertile, moist but well-drained soil Rate of Growth: average Flowering period: August to September Flowers: dark green to purple Other features: autumn foliage tints Hardiness: fully hardy An elegant clump-forming perennial grass with arching, hair-like leaves up to 50cm long. Normally a glossy green, the foliage turns a striking orange shade in the autumn before dying back over the winter months. From late summer to early autumn, the flowers appear in open clusters on top of the slender, upright stems and have a distinctive coriander scent when crushed. Garden care: Container-grown grasses should be watered well in the summer months, particularly when they are establishing. Cut back the dead foliage when it looks untidy.

Euphorbia seguieriana niciciana (spurge) £8.99
Position: full sun Soil: fertile, well-drained soil Rate of growth: average Flowering period: June to September Hardiness: fully hardy A stunning, late-flowering semi-evergreen Euphorbia with open sprays of intense, lime-green flowers held on red-bronze stems in late summer to early autumn. The foliage is handsome, too, with strappy, grey-green leaves held in whorls on the upright stems. This magnificent perennial forms a natural mound, bringing all-year structure to the garden. In the fading autumn light, it glows and looks fabulous among late-flowering perennials and grasses, or with spiky plants. It is drought tolerant once established. Garden care: After flowering remove the faded flower-heads. When working with spurges always wear gloves since the milky sap is poisonous and a potential skin irritant. Euphorbias do not like waterlogged soil.

Libertia peregrinans (libertia) £8.99
Position: full sun Soil: humus-rich, moist peaty or sandy soil Rate of growth: average Flowering period: May to June Flower colour: white Hardiness: frost hardy (may need protection in winter) The narrow, evergreen leaves of this New Zealand native form attractive, fan-like clumps, and their normal green colour may take on shades of coppery-orange when grown in full sun. This can look particulary lovely when backlit. In late spring and early summer you can see bowl-shaped white flowers nestled amongst the foliage, and these are followed by light brown seedheads. It looks great in either a mixed border or gravel garden. Garden care: In frost-prone areas, protect in winter using a thick, dry mulch such as shredded bark. Divide large clumps in spring.