Yes. Leaf septoria is a definite suspect now in both our problems I think. Mine are indoors but the plants were suffering in 90+ temps and high RH for all of July and half of Aug. until I got them set up down in the basement where I kept the temp and RH high for a week with added CO2 to get them in gear.
My leaves present more with yellowing and large dark spots rather than the pic here bit the end results are the same with the whole leaf dying and just dropping off.
One of the pics I saw on the web all looking about the same as this. Get way worse later.
Just took this pic of some leaves on my Otto#1 hi-CBD plant. Similar but lesser problems with the one that is a cross of it and Cannatonic.
Just seems to follow the branches upwards as the plant grows. The last 3 nodes at the top are fine but then the big fans start showing and it works up further.
I'll treat it like the Powdery Mildew and spray with a light mix of silica to make the surface of the leaves slightly alkaline. Fungus and molds don't like that. I can use Rhino Skin or the concentrated potassium silicate I have. Still need to do one more bug spray tomorrow to make sure those damn mites are finally gone for good so will use the silica as a rinse off spray the day after. Maybe it's just a silica deficiency and I'll kill all the birds with one stone.
