in soil you souldnt have to feed that plant about once a week and a cup of water goes a long way,dont keep soil wet,keep moist and at the stage your in,that soil will feed that plant for at least another 3 weeks,starting from seed in ocean forest,i water in before i put seed in,after that i put about a tsp of water in solo cup for about a week all around edge of cup,to wet will rot your stem,so moist is the key,in soil every time you see runoff coming from your pots,you also see a lot of life and nutrients,so my best method is just a tad ever now and then,when you get your first 5 finger leaves,transplant in final pot,,imagine this ,you have a pine tree 15 ft tall,how long is the tap root? tap root is half the length of plant,so a plant 4in tall expect a 2in tap root,so why water the feeders under it,water the edges and make it spread,when you water to much you also compact the soil,soil even with perlite,vermiculite still compact if abused,you hear the term flush,in soil flush means last 2 weeks of life ,feed nothing but water,the flush they recomend,is drench the shit out of it to flush out chemical imbalance,,you cant flush soil all you do is make mud that still hold these salts and chemical,,so even using the line up you got you can still do it proper as long as you dont over do it,,dont drench it,cup at a time,believe me as the plant matures it let you know when it needs more