I recognize a vivosun tent
You look like you're growing with CFLs, however, which is not a path to success. The ONLY way to produce high-quality weed indoors is through a minimum 600W HPS light. CFL plants are anemic and do not live up to the potential of the plant. You've also got some yellowing in the center of the leaf, which at that early of an age is due to a serious nutrient imbalance. Typically new growers overfeed their plants, which may be the case here. I would also recommend top trimming after the first knuckle to encourage a shorter, fatter plant, instead of letting it grow unhindered. Otherwise your bud will be rather thin and "popcorny." You can't fix this on this particular plant, so at the very least trim the bottom tier of leaves as the flowering sites in that area will be under-lit- a problem exacerbated by the use of CFLs.
Seriously though- ditch the CFLs. They aren't worth your time or effort and do not do your plants justice.