Im not sure if it needs nutes or has too much. VISC Titanium (KushxF.I.) Sprouted in rockwool then put into happy frog which is all that was available. About 1 month from sprout Pure R.O. water. Never tasted nutes yet. What is the discoloration?
I really doubt it's just starting to burn if you havent ferted yet. So i'd start feeding at 1/4 strength and see which way she goes. I wouldnt even worry about a single leaf on a single plant.
its most likely gonna spread to the other fan leaves. it really does look like the beginning of nute burn.my roadrunner and top 69 did the exact same thing and they hadnt been fed nutes either. the reason i later found out for the burn my babies received was from the water in their reservoir. it was just plain distilled. which even then is still to high of a ph for a hydro setup so one drop of ph down fixed that problem and now my plants are green and healthy as fuck my advice to you is.invesitgate the water your watering with. hope i helped a little
Happy frog and Ocean Forest seem to be hot out of the bag. Test your runoff ph, if its lower then 6-6.5 then its the nutes in the soil causing the burn. Good news is that you wont need any nutes for your veg cycle!
Looks like early signs of a magnesium deficiency to me. A little epsom, calmag, molasses, or nutes will help keep it at bay. Good luck!
Thanks for everyone's input. believe it or not they had actually outgrown the 1 gal. pots and sucked up all nutes and needed more. Once they got into 3 gallons with some fresh soil they were very happy. Very lucky from VISC. 10 beans. put down 6 and came up with 4 ladies and a good male. Harvest coming soon!