colour change on leaf

I don't think your going to loose the plants, they will recover from this easily. It could very well be calcium or also the beginning of overfeeding/lockout. When you using liquid nutrients its best to monitor the EC of the feeding solution to confirm your not over feeding them. It is also good to note that when growing Autos they do not like concentrations to high like traditional photoperiod strains. I like this link for a basic guide of feeding autos. https://www.autoflower.net/forums/threads/med-man-method-feeding-chart-ppm-ec.47856/ Best Of Luck! === Seems I have a fake troll account trying to cause shit by emulating me. They even went as far as to copy my profile picture and response to there troll lol. Someone sure is but hurt. m"Q"use is not @m0use Q vs 0. Q is fake like Q-anon Sorry for their rude comments on your question. I have no idea who they are or why they are doing this. Please hit complain and report this to Growdiaries. The real m0use profile is 2+ years old in age and has a higher rank. It's got the gold emblem on it, easy way to tell. ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***

DutchDoobie is right, I'd give him the chosen answer to be fair

It's all good, Tee. It could be one of two things: the start of a little nutrient burn, or the start of a calcium deficiency. I suggest watering your plants with just pH'ed water for a few days while keeping an eye on the tips of your leaves. If the browning is only happening to the tips and edges of the leaves, it's nutrient burn. If the brown spots start going on any part of the leaf, not just the edges and tips, it's a calcium deficiency. For this, you just need to hit it with some CalMag and she should be good to go. Good luck!

Ok, calm down... you're NOT going to lose the plant! Two things here... I think what you're seeing is the very start of a calcium deficiency (the spots) and that's probably brought on by a nitrogen toxicity (dark green/brown leaves) which has caused a lockout of calcium. So I would flush her out - 9 gallons of pH'd water through each pot - but in the last gallon, give her 1/2 strength nutes. Then wait til she dries out completely before watering her again. I would also, going forward, reduce the nutes that have high nitrogen levels in them... plants in bloom (which this one is about to be in if she's not already) need SOME nitrogen but not a lot. And I would also tell you to start some bloom nutes as she's going to be needing them! You're ok... you caught it in time! You might see SOME progression in the symptoms of the cal deficiency but they will stop. The damage, however, will not be repaired but you don't have to worry about that. Good luck!