I haven't had lamb for years. (my husband is not a fan, and come to think of it, I can't recall the last time I saw it in the store, although we had lamb chops regularly when I was a child.) We do have rosemary growing near our walkway and I clip it periodically for chicken and fish. It is definitely hardy! Is that a bit ofcobweb shining on the edge of the plant? It makes a nice composition.
