first thing's first.
miracle grow (abreviated as MG) potting mix is SPICY. seedlings rarely do well in it. it contains too much of the stuff plants crave, so much that they burn and suffer
most MG potting mixes also contain, as i can see in your pictures, a gelatinous silica amendment substance that they claim "holds water" when what it does is smother roots. thats what makes your dirt form that curious crusty surface after you've watered.
your plant is pale and stretchy. she is not getting enough of the things she needs to grow.
plants need light, warmth free flowing air on the leaves and the roots, plentiful water, but the water must NOT stand in a saucer underneath, and the nutrients should be abundant but not overwhelming.
first, get a LARGER pot something in the half gallon size, a plastic milk jug with the top lopped off does well. pierce ample holes not just in the bottom, but a few up the sides as well. place your pot on a pan lined with gravel, or a rack to ensure that excess water can drain away, and NOT be sucked back up, that just leads to root rot.
fill your pot with good clean dirt, if you wish to use miracle grow potting mix, you must add something nuetral to thin it out, like coco coir (coconut fiber) backyard dirt (with worms) or at the very least a lot more perlite.
ideally your dirt should provide plenty of places for roots to grab on, so your plant doesnt fall over, and it should store plenty of water, but nutrients should be sparse enough to make the plant reach for the food. you can always add more nutrients, but dirt that turns sour and burns your roots will snuff your plant.
place your plant, pot and all in a bath of plain lukewarm water and gently massage the MG potting mix away from the roots, then plant your seedling in your fresh MILDER dirt and water her in. she may wilt, dont panic. you really need to get that hot ass MG potting mix off the roots, and a lukewarm bath works wonders.
place the larger pots with the milder dirt and the fresh washed seedlings under your lights, and bring the lights CLOSER, with CFL's you can get the lights right down in there, like an inch from the leaves. this will give them more of the light and warmth they need at this stage.
within a day or two they will perk up and then you gotta check em every day and move the lifghts as needed to keep the leaves from reaching the bulbs. clip on shop lights with 12-24 watt CFL's will really help you keep the lights on the plants without being terribly hard to move.
finally, on the lights... you most likely do not have a 75 watt CFL unless that fucker is BIG. look at the base of the bulb, where the ballast lives, it will tell you there what the actual wattage is, rather than the incandescent equivalent number on the bulb packet, which means nothing. most CFL"s come in 8-12-24 watt sizes, rarely will you see a 25 watt bulb, and 75 watt CFL's are specialty items from garden shops.
if you got the dough, get a four tube T5 fixture and use that rahter than edison type lamps. youll get more light for less power, and the tubes last longer and are cheaper to replace than CFL's. CFL's make fabulous side lights and additional lighing for when your plants get big, but they are not very efficient whn compared to a tube fixture, even a T8 or T12 (bigger number means larger diameter tubes and lower efficeincy, smaller T numbers are best)
once you have your plants in good dirt, watered well but not soggy, and under plenty of light, if everything goes to plan, your babies will turn a much darker green and and start growing fast. DONT FERTILIZE until your plants start looking a little pale, like a month or more from now. then use any fertilizer you like, using the instructions for tomatoes, or if you have a cannabis specific fertilizer, as directed.
i usually fertilize about half whats on the packet, and do it half as often. this gets good results. once your plant starts demanding more fertilizer to keep the growing going, you can edge up the dosage and frequency slowly, just be careful not to burn them, nutrients are the number one killer of dope plants, we just love them too much.
good luck bro.
