I've got the same problem...with the American Lady cats. I'd brought in all the AL catsI could find on the Sweet Everlasting here before the hard freeze (25.4°, too early for that!). There were probably more 1st instar AL cats, but they burrow into the thicker basal leaves and can't be spotted. Nothing I could do about them. Then after the freeze, I remembered there were also some plants I'd seen once in an area back of the community mailboxes near the neighborhood entrance. There were some late instars there, still alive! Amazing! I can probably find enough foliage to feed the AL cats I have. Only the plants that bloomed are pretty much gone foliage-wise. Most of the plants didn't bloom and except for what's been eaten by cats, the foliage will probably last a while. I believe they behave like biennials here, staying low the first year, blooming the second. I covered up the stinging nettle before the freeze, but still found a couple of small RA cats that were dead later.
