Echinacea rotting leaves
I've been growing these echinacea seeds since January. The leaves are rotting and shriveling. I have good grow lights and my other plants are not doing this. I only water when the dirt feels dry. I fertilizer weekly with fish emulsion. Two weeks ago I uppotted to 4 inch pots. Any tips? See attached pics
Utah County Utah
This does not appear to be a disease problem since only the older leaves are affected. I would recommend backing off on the fish emulsion, as it appears that the leaves might be affected by accumulation of salts in the soil. I'm not sure why only these echinacea seedlings would be doing this, but it could be genetic. Try that tactic and see if the current foliage stays green and healthy.