First grow auto seedling failing?? Help

is that coco? if not prepared right, it will hinder growth for a while as the exchange sites get into proper equillibrium, in meantime could cause K-tox. seed doesn't need nutes for a while, and coco is typicaly buffered, if prepeared well by manufacturer, so you only need pH'd water for 2 weeks.. let cotyledons dictate.. fade onthose, start up, since coco provides nothing on its own. don't let coco dry out like soil. go more by weight of wet and dry-ish. evaporation could cause what you are seeing too by increasing concentration of what is in the substrate. i know not a decisive answer, but just eliminate the possibilities that you can with information you can't be expected to type out in such verbosity.

you stil need to water around ti well.. don't use a spray bottle.. a watering can helps avoid displacing soil (or tank+watering wand etc). if pouring from soemthing else, just go slowly, but do get some run off. this is a great time.. you water 1 time ever 3-5 days, lol. enjoy it! check in on it sure, but don't expect to water for a while early on. zoomed in i can't tell, but pot size is likely fine.. saturate that bad boy and take it easy for a few days. looks quite dry.

Looks like it should be fine. Just keep doing what you're doing and you'll see the growth pick up in a few days.

Seems to be having some new growth now out of the top! Don't give up on her yet! It's a Weed for a reason! Happy growing bro! GL!