A short update.
I used a fungicide (one never used before) mixed with an acaricide (is this a word???
) on the sick plants. Some look like they are getting better.
Little show stopper had no beneficial effect, I forgot that I divided it and changed its place in the garden at the end of the past summer, I don't know if it can be part of the problem. The new spot is just 10 inches right of where it was before.
The seedling with rotten inner leaves is still alive, I was afraid it was about to die. I cut all the foliage and see that below a certain point the center is good, and it's growing again at a good pace.
I found the same problem on other three registered cultivars but it seems the damage was circumscribed in just one spot so the inner leaves broke but they still grow.
There are little gray snails (the ones with their own home attached) inside some plants and it seems I can't get rid of them. Slug poison seems to have no effect in them, and they hide very well inside. Any idea?
Thanks!