This is my first grow, the strain is a cross of hashberry and sour diesel, it is growing temporarily (until larger size) in a old speaker that i converted to a covert grow box, it is 2ft tall and a little under a foot from either side to opposite side, the lighting at the moment is a cfl that i believe is a 120 watt cfl bulb that is suspended from the lid, to get airflowni have a small fan on bottom blowing air in and one up too pulling air out, my light cycle is 18 and 6, the temp stays at 75 degrees Fahrenheit and i water as needed which is every few days. The reason for my concern is hard to spot but one of my serrated leaves is yellowed toward stim and seems pinched in yellow spot and the rounder leaves have turned light brown and wrinkled in some spots other than that it seems fine and is around 6-7 inches tall And the plant is almost to two weeks old.
.png)
What growing medium is the plant in? Is that coco coir? What nutrients have you given to the plant (if any)? That seedling looks a little stretchy. Most likely it's due to not enough light. The yellowing is occurring on new growth right? This is common and it will eventually turn green. If it stays yellow on the inside of the leaves for several days, you may have an iron deficiency.