Yellow Leaves on Young Plant

what could cause my 1 week old plants leaves to turn yellow?they have 1 set of serratus leaves but noticed a very slight hint of yellow starting transplanted 2 days ago with jiffy cups into 5 gal container using same soil have not used nutes and is growing outside got full SO CAL sunshine any help???

could very well be a lack of nuit m8, no harm in mixing up a soloution in a 2ltr bottle or something and go water her, full cali sunshine sound dam good, but its bound to dry the soil up a little.....did u do any prep work b4 u planted her?

could many things a pic would help but probs needs feeding....are the tip of the leaf burnt thats over feed...what medium r u in...because most promix have enough nute in the medium to last probs 3 weeks...so if ur feeding that could be why,,.

I am using fox farm ocean forrest and have not added anything but purified water

so ur outside but potted then? a pic would help as cannabis loves to exibit so same symptoms for differnt probs...lol

again she is 1 week old germinated inside and put in jiffy cup 4th day she was 2 inches and had set of serratus waited another 4 days and poped her in the 5 gal and put in my ff ocean forest same as used in jiffy cups just water every other day as she got dry and thats it the ones inside under fluoros looking good just poped them today into 5 g containers doing same method and want to put them outside also under 18 on and 6 of to get them adjusted to outside light

ok so ur using pro mix are u feeding if so thats y they are yellowing because pro mix normally has enough nutes for the plant to grow for at least 3 weeks!!! same with bio bizz light mix etc