22/08 - Begin of week 7. Very impressive the difference from yesterday when I did defoliation. This plant recovers pretty fast! Trying to bring down my soil pH.
24/08 - Only 3 days after defoliation, the plant packed some serious bush. Very happy with the growth development.
26/08 - I can't keep up with this plant. I am trying LSD for maximum light.
28/08 - Last day in week 7. The plant had a big stretch this week. I'm continuing with LST and with light defoliation and leaf tucking.
Only on one leaf of one plant. Is this some fungus or virus?
It looks a bit like coffee rust, but I couldn't find anything else like it.
How should I proceed?
Thanks in advance!
Pretty certain this is Leaf Spot Fungus otherwise known as Rust Fungus... and you'll need to jump on this quickly as it spreads fast... it spreads by spores that you can't even see so don't think you've got any time to waste here... I won't go into all the details of what you need to do as this article is very thorough.. Do give it a read and get going so you don't lose your entire grow...
https://www.urbanorganicyield.com/rust-spots-on-leaves-during-flowering/
Good luck!