My little grow :)

Hellooooo errybody! I am a new grower, I've had about 4 plants sprout outside but they had gotten ruined from the wind and other animals. I now however have 3 plants, I have one plant that is from a random seed in a bag of middies (reggie) and i have two other plants that i was given by a friend which are supposedly Blue Grape Ice (BGI) plants, I have them set up under 3 different lamps, each lamp having a different type of bulb (yeah i know its ghetto as hell but im poor as fuck) they staying alive and getting bigger, so thats good news, but the 2 BGI plants are in soiless mix where as my rando-plant is in soil from outside, they seem to be doing fine but does anyone have an idea on how to make a cheap at home mix so that i can switch the medium that my rando-plant is in, im worried it wont get enough nutrients and oxygen spread throughout the outdoor soil.
 
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