plz lend some advice

ok so im growin outside in a hothouse, my young plant has bout its 6th set f leaves but now the seedling leaves are dying (the lil rounded ones) but also its first set of jagged leaves are also yellowing,,,,, problem or normal???? wats up?

thats normal

maybe time for nutes with high N

mos def normal dude, but double check Ph, and giv'er some nutes

I don't add nutes until they are about a month old. Ph test and watch the temp.