As a comment about Lamb's Ear (Stachys byzantina 'Big Ears')
If you like Lamb's Ears this one's a great variety. The larger leaves and more upright habit not only create a beautiful clump but the older leaves are held higher and have less of a tendency to die. Gravel or rock mulch around the plant also help reduce rot. Like all S. byzantina varieties avoid wetting leaves on hottest of summer days. Multiplied from 3 crowns to a dozen or so in it's first year and very low maintenance.