Beautiful! Lamb's Ears spread quickly, so each of these clumps may have begun with just one or two plants each. I wouldn't plant this many together at once, but you won't have to wait long to get this look. If you want even speedier results (and don't mind thinning later), plant 2-3 per clump and sprinkle some seeds around them. There are many plants with soft gray leaves that go by the name Lamb's Ears, so check the tag for more info. Many of them have beautiful flowers; some can be invasive (including my favorite, Rose Campion, aka Lychnis).

Lamb's ears...I have them too and they are fun and fuzzy, but they are a beast to separate!! only a shovel will do!! :)
one note about Gertrude Jekyll. I read that she banned "love lies bleeding" so I got some :) and I love it! it's taller than I expected but it's beautiful and creepy at the same time.