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 characias Silver Swan = 'Wilcott' (PBR) (Spurge 'Silver Swan'): A striking, variegated form with blue-green leaves edged in white. Green and white flowering bracts in late Spring.

Euphorbia myrsinites (Spurge): Sprawling stems of glaucous leaves and acid green flowers in spring. Prefers full sun and good drainage. Hardy. Up to 30cm.

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.

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.