ok dude, lets see, perlite is always good, more is always better. plants can be grown in nothing but perlite (for crazy hydroponic people, i wouldnt but hey, it 'can' be done) its great for draining, every time your transplant, add more perlite.
now speaking of transplanting, stop doing it!! that plant is like 1 month old and its been in like 6 pots, bums on the street move around less dude!
um the .14-.14-.14 stuff you got, sounds ok... but not really. use it sure, at a very low strength, but now is the time to start thinking about actual nutrients and their values, for growing, you want nitrogen heavy stuff, i use one thats 9-2-3 at 1/2 strength, as well as some stuff like what you got (low even ratio) and some micro nutrients (molybdenum, iron, sulfur, manganese, magnesium,.......)
the last pic you posted shows a plant that is light green/almost yellow in color, in vegetative state, thats Nitrogen Deficiency.
you do know the NPK thing right? N-P-K ... 9-2-3 means 9% nitrogen, 2% phosporus, 3% potassium. <-- thats what i used and i had a slight abundance of nitrogen in vegetative state,sure it grew fast, but you could tell be the slightly dark(er) green leaves.
heres a diagram that has saved my ass countless times, that i got off this site (thanks original poster, whoever you were)
View attachment 1858055
and PLEASE PLEASE PLEASE, dont get all excited and dump a gallon of chemicals on it and burn it cuz you think its gonna be good for it. its a baby, feed it slow. 1/4th strength, in 2 weeks, go to 1/2 strength, then 3/4ths after another 2 weeks....
and my last tip i will leave you with, is if your in doubt, come back to RIU, theres always learnin going on here, and we all have brain farts and post questions on here from time to time to figure out wtf is going on
(you do have a pH tester right? was that mentioned in the last 3 pages?, im gonna assume your water going in, and coming out is around 6.5)