Help! Lower leaves are turning yellow

[Weeda]

hello,

am a new grower , i had couple questions before in this forum
but i noticed that the lower leafs are turning yellow

am not sure what strain is it , been told its Bentley strain

i used Mircale grow on it two days ago

the soil i don't remember the name but it was seedling soil


this is the pics

 

[Weeda]

yo 190 views , i got a pic for the soil

 

[wufo]

Cannabis Plant and Pest Problem Solver - Pictorial

Have a read thru this about lockouts and see if u can find yours, I'd check ph first, haven't had it myself so just trying to head u in right direction.

 

[Conradino23]

This is cotyledon, man. It will always get yellow as marijuana plant sucks all nitrogen out of it while it's growing