Another idea for the sloping site would be to use dogwoods – different varieties of Cornus. This would create a leafy bank, with soft greens and whites, and coloured bark in the winter. Growth could and must be controlled by pruning early in the spring. But I wonder if the site is damp enough? And is this the right ‘image’?
Cornus stolonifera ‘flaviramea’ (www.wildchicken.com)
Cornus Alba ‘Elegantissima’ (www.pflanzmich.de)
Cornus ‘Midwinter Fire’ (www.wyevalegardencentres.co.uk)
Cornus ‘Flaviramea’
And what about the need for colour? Perhaps low-growing mounds of colour?
Leucanthemum ‘Banana Cream’
Alchemilla Mollis
Sedum ‘Autumn Joy’
Nepeta ‘Walkers Low’ (www.crocus.co.uk)
You may be interested in
Dogwoods
Cornus ‘Flaviramea’
space