Double Grape

Hi! Autoflowers tend to show their sex at week 3-4 (White pistils) and from there they will start to flower but it can take another week or so before the actual preflowers start to develop. She is little bit small in size BUT the first few weeks of flowering is the stretching phase where the plant doubles in size and starts to develop bud sites. So you are not doomed at all but won't get a monster sized bush tho.

I would say you may be feeding her to early, soil has enough nutes for their youg life. I wouldnt feed to heavy, with all the nutes I see your providing your girls, they can go downhill very fast. 1/4 nutes to start if your feeding by the label, half what they recommend for full veg. I recommend a good ph and ec reader if you dont have one and when they actually need food, feed them by proper ec levels. Cheers