unless you have all the products laying around.. you are spending a LOT OF MONEY on 2 sunflowers ..

you also said: I sprayed it quite liberally last night and this morning I saw signs of further infection.

and i find it hard to believe you can see differences overnight ...

if it were me.. i would be done with these 2 .. and go plant a few new seed .. is there a reason they have to be in pots ...

whats so special about these two seedlings??

ken

"is there a reason they have to be in pots ..."

I don't have the space to grow them in the ground.

"and i find it hard to believe you can see differences overnight ..."

Does this mean anything? I'm not sure what you're trying to say. The difference isn't that big, it's just yesterday I didn't notice spots, today I did. They could've been there yesterday too but I simply didn't notice. And again, the difference isn't that big, please refer to the images. The spots are still faint, but present.

"whats so special about these two seedlings??"

They were growing so well and are already starting to flower. I feel like it'd be wasted effort to just dump them. I want to at least try to save them if at all possible.

Disregarding cost, is there a way to save them? I'd like to at least try, even if just as an experiment.