I have had terrible luck with salvias this year. The microphyllas I have do fine. But all my others, Chiapas, Amistad, Guarantica, Curviflora, love and wishes, Wendy's wish most of these have died or are dying. First they get black on the edges of the leaves, then the stems. After this the black spreads to the whole plant until it dies. I have been able to save a couple of them by pruning the black off with sterilized tools and spraying with neem oil for now anyways. Other times nothing works! It's so disheartening because I love salvias but now I'm too afraid to buy anymore. I should also mention that this happens to the salvias I have in pots as well as the ground. What's going on here!? I don't have photos right now, but I'll try and take some later. Oh and also this has happened to my two agastache I have, they are both dead now.
Carly