Carex 'Silver Sceptre' (Sedge 'Silver Sceptre'): Evergreen clump-forming grass with green strappy leaves striped with white. Ideal for border edging and pots. Hardy. Up to 50cm.

Dryopteris affinis 'Cristata The King': Tall, semi-evergreen fern with arching fronds,each leaflet is divided (Crested). Best in moist semi-shade. Hardy. Up to 1.2m.

Euphorbia amygdaloides var. robbiae (Mrs Robb's bonnet): Great plant for difficult dry, shady areas. Evergreen dark-green leaves and vibrant lime-green flowers in spring. Suckers and can spread.

Euphorbia palustris (Marsh spurge): Bright acid green bracts in spring. Height to 90cm. Hardy.

Euphorbia palustris 'Walenburg's Glorie' (Marsh spurge 'Walenburg's Glorie'): Bright acid green bracts in spring, creating vibrant clumps of flowers. A warmer yellow than the species. Good on moist soils. Hardy. Up to 1m.

Hakonechloa macra (Japanese Flowing Grass): Mounds of arching green leaves that just touch the ground. A wonderful shade lover grown for its elegant flowing form.

Helleborus x sternii (Stern's hybrid hellebore): Evergreen perennial with blue-green leaves, purple stems and pale green bowl shaped flowers. Needs a sheltered spot. Up to 35cm.

Primula 'Francisca' (Polyanthus 'Francisca'): Really unusual variety with green/acid yellow flowers. Very eye-catching flowers which last for absolutely ages. To 20cm. Hardy.