Crinkly Lambs Ear

One of my patches of Lamb's Ear is looking pretty nasty in Garden 3. What is usually lush silvery green foliage is wavy and crimped looking. Typical issues for "Stachys" are rust, leaf spot and powdery mildew. This doesn't look like any of those. The plant is not thriving as it was in other years and in other beds. It all comes from the same original plant which makes it so random. It can't be water logged, because it's in a raised bed. It just doesn't look right.

(I ripped this out 5/6/2006. I believe it was some kind of rot.)