White Widow Auto seedlings are sick!!

Hello everyone, so I've three white widow auto's from ILGM.com theyve been doing good, but recently ive noticed they havent been growing much, and im getting some yellowing on my bottom leaves on two of my girls. Im thinking deff. But would like some other opinions before i start feeding this tiny seedling any nutes.

They're currently under 12/12 lighting. Ive only got one grow room and have a big girl in flowering so ive gotta make do till i can put them under 18/6. Of their own. But temps are 75 at night, 80 during the day. Humidity at about 60 steady. I just put a fan back on them today.

Theyre in 3" peat pots, planted germinated seedlings on 1/05/15. Into a mix of MG seed starter, and original MG soil. Theyre going to be replanted into 3ga. Buckets of FFOF with a 10% mix of perlite and sphagnum moss.

I keep them watered until the soil dries, then rewater. No nutes fed yet. Ive read alot about autoflowering strains being sensitive to nutes. So are these girls really ready, what strength could they handle?

• I'll be feeding FF Grow Big 8-4-4

those pots are kind of small, that tall one may just be yellowing from hitting the bottom already, could also be a pH thing but i would say just transplant them and it should work itself out.

Looking healthy to me. Those yellow leaves are the first set of leaves they are meant to die. Make sure you re-pot them soon and start with half dose of nutes at week 6.

*update, so I tried watering with 1/8 strength ff grow big in the peat pot, it pretty much did nothing. So i made a transplant to 3ga. Of MG soil soaked in 1/4strength FF Grow big. Stopped the problem completely.
* also, instead of planting the peat pot. I soaked it, ripped it apart, gentle on the plant, and transplanted directly into soil.
And all three have shot pistils

Look really nice to me.