23/07 - First day of week 3 in veg. Had a little bit of a problem with soil pH. Trying to correct it yet but this plant already looks better so I think it's working. I don't know if was the right choice but I topped the plant. I hope this does not go wrong. Fingers crossed.
25/07 - Continuing with LST and did some defoliation. Watering every 2-3 days.
27/07 - Some serious LST going on, continuing with defoliation to open the canopy and maximize light intake.
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!