Well with my experience now grown 10 plants maybe, Seedlings don't need much nutrients until about the 6th node. Just a personal opinion.

Tip - I've noticed my indica plant that was right next to a fan that was blowing fresh air right at it, the plant is dark green with no yellowing what-so-ever, so they like a lot of good fresh breezy air.

(( Sorry for double posting if a mod is reading this could you maybe nuke the earlier post ))