help! 4 new babies one bigger than other 3..??

iight..so here my 4 new plants.. they were in the same pot for about a week and half o maybe two..i tanspanted them like 3 o 4 days ago and one is doing grate o think.. but the other 3 they dont look so happy to me..they are still small and not so healty looking i think..some help here will be apresiated..what should i do..why u guys think they like that..? dont kno..

sorry for my english but im from puerto rico.. spanish is my first lenguage..

first check you ph, it needs to be between 6 and 7 for good growth in soil, if your ph is ok find some plant food with a high nitrogen rating and give them 1/16th - 1/8th of a dose of what is says on the bottle. they look like theyre struggling to absorb nutrients.

so u think its the soil...? because i have them in earth from my backyard..all of them even the bigger ones..how can i chek the ph..? im on a very tight budget so what would u recomend..?

cheapest way is to get some Litmus paper you can get it VARY cheap from your local pharmacy or e-bay i know mine cost me 99 pence about $1.25 to keep ph at a neutral level use garden lime