Tiarella ‘Appalachian Trail’ (trailing foam flower) £8.99
Position: partial or deep shade Soil: cool, moist, humus-rich soil Rate of growth: fast-growing Flowering period: May to July Flower colour: creamy-white Other features: potentially invasive Hardiness: fully hardy When they first appear in spring, the heart-shaped leaves are a light green with just a touch of rich plum veining. As they age, the leaves turn darker and the veining becomes more noticeable, creating a very attractive two tone effect. Initially forming loose mounds, they send out slender leafy stems that will either creep along the ground, or tumble over the edges of a pot or hanging basket. In late spring and early summer small clusers of tiny white flowers appear on the upright stems, which hold them like miniature sparklers above the leaves. Garden care: Add plenty of well-rotted leaf mould when planting. Lift and divide congested colonies in spring and apply a generous mulch of well-rotted garden compost or compost leaf mould around the base of the plant.

Lamium galeobdolon (yellow archangel) £7.99
Position: full sun or partial shade Soil: moist, well-drained garden soil Rate of growth: average to fast Flowering period: June to July Hardiness: fully hardy Small, silver streaked mid green leaves and whorls of pale yellow summer flowers. This colourful dead nettle provides the perfect naturalistic groundcover for a shady border or light woodland. Creeping stems quickly form a dense carpet of silvery foliage. Although less vigorous than the larger leafed species, avoid planting it next to small plants. Garden care: Position well away from other small plants. To check the plant’s spread dig up invasive roots in late autumn or early spring.

Sisyrinchium californicum ‘Yellowstone’ (golden-eyed grass) £6.99
Position: full sun Soil: poor to moderately fertile, reliably moist but well-drained, neutral to slightly alkaline soil Rate of growth: average to fast-growing Flowering period: June to August Hardiness: frost hardy (may need winter protection) Cheerful, bright yellow, open star-like flowers above clumps of sword-shaped, grey-green leaves. This semi-evergreen, summer-flowering perennial is perfect for a sunny, rock or gravel garden. Best planted in well-drained, neutral to slightly alkaline soil, although short-lived it self-seeds freely. Garden care: Lift and divide large colonies in spring. It self-seeds freely, so if you do not want it to spread too quickly, cut off the spent flowers before they set seed.