U worrie to much lol that big beautiful plant when she starts buding u will see more and more stuff like that do worry can save every leaf lol oh and if you don't get a bigger pot soon you are really going to start loosing leafs that plant is veary nice did a great job on it
Use rose rx 3in1 or safer brand 3 in 1. I just went through that helping a buddy diagnos it. Its leaf spot fungus. After we gave the rose rx 3in1, 2 days it came back to looking much better.
Does she need some Calmag?
I'm guessing with a plant that large in a pot that small, you are going to see alot of deficiency issues. I would consider a transplant to a larger pot. The extra earth will store more nutes and give you a much better buffer against swings in nutes and PH. Also, a more stable platform just in case it gets windy. This is just based on experience growing other garden varity plants. I have never gown cannabis in a pot outdoors.