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Please recommend heucheras for ground cover and how many plants for say 1sq metre under some shrubs.
You will need appropriately 4 or 5 plants
If its shady from 10.30 to 4 o’clock you can have limes and lighter colours such as Heuchera Lime Marmalade, Yellowstone Falls (which is a creeping or trailing variety)
If it get more sun the plants like Heuchera Frilly Lizzie, Redstone Falls (trailing or creeeping), Violet Shimmer or Fire alarm to name a few
Hope this helps
Vicky and Richard Fox