Clematis Diamantina (‘Evipo039’) (PBR) (clematis (group 2)) £14.99
Position: full sun or partial shade Soil: fertile, well-drained, neutral soil Rate of growth: fast-growing Flowering period: July to September Flower colour: lilac-purple Hardiness: fully hardy First launched at the Chelsea Flower Show 2010, this showy Clematis will put on an exceptional display of pompom-like flowers for several months from midsummer. Each flower will grow up to 15cm across, and can last for up to 1 month, so the overall display is pretty impressive. Garden care: Remove dead and damaged stems before growth begins in early spring, cutting all remaining stems back to where strong buds are visible. Apply a slow-release balanced fertiliser and a mulch of of well-rotted garden compost around the base of the plant in early spring

Arbutus unedo (strawberry-tree) £11.99
Position: full sun Soil: fertile, well-drained soil but can tolerate alkaline soils Rate of growth: slow-growing Flowering period: September to November Flower colour: white, often pink tinged Other features: lovely strawberry-like red fruit Hardiness: fully hardy Spreading, shrubby tree with shredding brown bark and glossy bright green leaves. It is attractive in autumn when the white flowers, often tinged pink, are produced and the fruit from last year are turning red. The tree gets it’s name from these fruit, which look like strawberries but sadly don’t taste like them. An excellent tree for costal gardens or in a sheltered spot inland. Garden care: Requires minimal pruning. Remove any broken, diseased or crossing branches in late autumn or winter. When planting incorporate lots of well-rotted garden compost in the planting and stake well.

Geranium Summer Skies (‘Gernic’) (PBR) (cranesbill) £8.99
Position: full sun or partial shade Soil: fertile, moist, well-drained soil Rate of growth: average to fast-growing Flowering period: June to July Hardiness: fully hardy Up to 30 pale violet-blue petals, with reddish-purple veining and a near-white base, form green-centred double flowers. These appear in profusion, especially when grown in full sun, from early summer above the neat clumps of finely cut foliage. Garden care: In midsummer rejuvenate plants that are beginning to look jaded, by removing old flowered stems and leaves. Lift and divide large colonies in spring.

Astilbe ‘Bressingham Beauty’ (x arendsii) (false goatsbeard) £5.99
Position: full sun or partial shade Soil: moist, humus-rich soil Rate of Growth: vigorous Flowering period: July Hardiness: fully hardy Delicate, feathery, vivid pink plumes appear in midsumm er above serrated, bronze- tinted, mid-green leaves. This astilbe is one of the taller varieties. It’s ideal for a moist bog garden or moist border, and the foliage contrasts particularly well with plants like rodgersia which have bolde r, coarse-textured leaves. Although it can grow in drier soils it does need to b e in a shady spot. Garden care:Newly plant ed astilbes need to be kept well watered until they are established. Lift and di vide large clumps every three or four years, discarding old, woody rhizomes. Mul ch with well-rotted organic matter in spring.

Crambe maritima (sea kale) £5.99
Position: full sun or partial shade Soil: deep, fertile, well-drained soil Rate of growth: average to fast Flowering period: June Flower colour: white Other Features: edible stems Hardiness: fully hardy From amongst the clumps of ruffled blue-green leaves, thick stems arise in early summer carrying small white flowers in dense clusters. It will gradually spread to form quite big clumps, adding textural interest and colour to the planting scheme. Particularly valuable in coastal gardens, where they can form large colonies just above the high tide mark. This decorative plant is also very useful as the leaves are edible and the flowers will attract bees to the garden. Garden care: In January cover the crowns of two-year- old plants with special earthenware blanching pots or large plastic buckets, weighed down with bricks and surrounded with a mixture of well-rotted, garden compost and leaf mould. Once the blanched stems are 15-23cm (6-9in) high harvest by cutting below the crown.