soil disease or other?

[Altmer]

Hi, I have similar yellowing on my pink oxheart plants which is SLOWLY spreading to others. I have it every year at varying levels of severity. This year is particularly bad, which I'm certain is due to the wet, humid weather we're having in southern Ontario (last year it was excessive heat and flower drop, this year TONS of flowers/fruit but also tons of disease). In past years, I would touch my plants indiscriminately and move on to the next which would cause it to spread very fast. This year I'm not touching them, just pruning, and if I do I sanitize tools and hands before moving to the next plant. It makes a huge difference. So you might want to try this and in the meantime know there are others in solidarity with you