Help, what do i do about this brown spot

Hey so I just bought a few clones from a local grower I think there about a 1-2 weeks old + the 3 days I had them in my possession. I'm starting to see brown spots on one of them the others are doing absolutely fine in my opinion. What should I do about that leave with the brown spots? Should I cut it? Also I transplanted the clones into a 5 gallon pot and I am using fox farms soil running under one 1000 watt led light. My temperature can range anywhere from 22c to 28.9 on a really hot day.
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I wouldnt worry about that spot could be nothing as its so young. If you look at the top new growth it looks fine so wouldn't worry until the new growth is affected BUT it could be a sign of P deficiency but at that stage being so young its doubtful. And this is a common problem people using fox farm planting there ypung plants in it its far to rich for small plants you need to use a lighter soil when your transplanting young plants don't no many brands of soil but the one i use is biobizz light mix its perfect for yojng plants then when i transplant into a bigger pot i use allmix look it up m8 its cheap.and all organic stuff....

sorry but also you should really use smaller pots for smaller plants let the plant fill the pot with its roots them transplant into a bigger pot or your final pot i normally pot up 3 times this way your plants grow quicker as the roots don't have to do as much work soon as the roots fill the pot they boom. Just an idea for you pal

think you might struggle in that fox farm with such a small plant m8 it will take a while to start growing the roots have to get round the pot and then your plant will take off just seen alot of problems on hear peopl using that soil

plattynum85 said:

think you might struggle in that fox farm with such a small plant m8 it will take a while to start growing the roots have to get round the pot and then your plant will take off just seen alot of problems on hear peopl using that soil

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Okay thankyou so much I will take all that advice and go with it! The reason I got the fox farms is because that's what the grower I bought from recommended. But as you can tell I am a very new grower and this is my first time so I'm making all the rookie mistakes