Leaves drying out

Hi I have two three week old seedlings and on one of the plants the leaves seem to be turning yellow and drying out (as you can see in the picture marked plant 1). If you look at plant 2 the plant seems to look fairly healthy, but still the leaves seem to be going yellow on that one as well. When I first planted the seeds I was bringing them up in miracle grow compost, but when I re-potted them I decided to use Biobizz All-Mix because I have heard nothing but good things about it.. When I re-potted them, about a week later I gave them their first feed (as directed on the cannabis plant feeding schedule). Oh by the way I am using Biobizz Grow, Bloom and Topmax (not all at the same time obviously) Can anyone tell me what the problem might be with plant 1? Many thanks in advance

Hey Buddy, sounds like you started feeding them too early...I think you should have waited until week 3 at least, but no probs just take it easy from now on. Use about half the recommended amount to start with & maybe increase it as they get bigger. Also make sure your pH is right as this often leads to complications. Good luck

Oh right ok I'll try that, and my PH level is 6.6

hi I also use bio bizz, and totally agree with zaycor, ive found that some varietys can take all mix fine when they are young and some struggle, get some info on yours, say something like pineapple chunk being a light feeder can struggle, I now use a light soil, I actually go john innes seedling,for 2-3 weeks, then bio bizz light, veg them for 4 weeks or so, proberly only with 1 or 2 light feeds then transplant to all mix a week or so before flower and I find they stay really healthy and only have to start proper feeding as they go into flower, remember with soil grows, soil is king!, so keep that balanced/not overfed then youll get good results, feeding too strong to early can,put your soil out of balance later with salts etc, then you have to do flushes etc,

I can also see your getting some canoeing on a few leafs, what light are you using distance etc, temps. and your watering schedule, have you put drainage in the small cups??

Too many nutes, back off of them for now