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we have a large shaded area of the garden that needs ground cover
You don’t say if it’s dark or light shade ?
Nearly all the heuchera heucherella and tiarella can go in partial or light shade.
Tiarella, heucherella and lime or light coloured foliage heucheras, like I’ve added below can go in deeper shade.
Hope this helps
Kind regards vicky
Vicky and Richard Fox