Sometimes theres a seed sac that sticks to the sprout preventing it to open. I always help my sprouts and most of the time take the shell off and the sack if it doesn't come off while pushing through the soil. Not sure if this is the problem also i take the dome lid off after they sprout so they can have fresh air i dont advise any of what i said cuz its what i do and works for me. I just popped a Green House White Widow right about the same size should be interesting to watch both of our grows grow out over the next few months
How long do you plan on vegging im going to try to veg for 2 months. Im going to bend her right over tip of the plant straight to the ground when she is ready then im going to LST her in a circle around my smart pot. All the secondary growth from tying her down im going to use eyelets in the bottom and sides of the box to tie them down to make a even canopy then once the secondary is long enough and full enough and even im going to throw a screen over the bitch and stuff her back down when she trys to grow through the screen then cut all LST strings so everything pushes up toward the screen then flip 12/12 when the growth is all poking through the screen. Im going for straight colas at least 20, nuggets corner to corner just packed
Oh and im going to cut everything off under the screen like bare to not lose any bud making energy from the plant