Dude those are the same sprouts??? wtf really damn guy I would say just keep doing what your doing, all strains are different, all plants are different, all soil is different so on, and so on. But they look good!! age is not really a good comparison imo. how many grows you have completed, yes compare all day!! you have to look at how long they have been growing to say my plants are smaller than,,, "an experienced grower "
I would wait untill I start to see signs of deff before feeding, if all is green leave it, dont fert!! now that yellow little thing something is up?? maybe mix a tiny bit of grow nutes.... I mean a tiny bit, like 1/2 teaspoon in 1/2 gal of water and give it just like 1 cup of water, dont give the entire 1/2 gal. this may help a bit. make sure to ph your water to 6.5 MG soil is going to fuk you up every time untill you switch. Use it for this grow, and find something better. in a few yrs you can say, yea i used mg for my first grow, what the fuk was I thinking? and laugh it off.