I’ve got some sort of fungal infection on just about all of my plants. I didn’t realize it until I cleared the room out today and the backside of many of the plants is infected or the base. Some of the damage is pretty bad and I’m noticing it’s on just about every plant. I’m sure it’s from lack of airflow, excess moisture, and temps. Been growing for years and never had issues like I have this fall/winter.

Can post pics but it’s the same fungus in my previous post. Looks like rust climbing up the base. Off colored corking.

How should I approach this? Never dealt with fungal infections. I’m afraid I’m going to lose my collection at this point; between the pest damage and now this. I think it might be scale looking at other pics. I’m at a loss here.

Copper fungicide? Garden phos? Foliar? Drench?

Appreciate any advice