autoflower nutes

Ok so my question is pretty easy for someone to answer if you have grown auto's before. Here are the facts:
25 days into grow
400watt mh lighting until final two weeks where i will switch to 400hps
pro mix bx soil in 3.5 -4 gallon containers
7 female auto hindu kush

Now for the questions:
1. How do I feed them, should i give them quarter strength in the flowering stage of my nute schedule or quarter strength in the veg schedule. by the way i'm using general hydroponics flora series nutes. really worried about nute burning the girls.
2. They seem really small for their age, they are 25 days old and only 5 maybe 6 inches in height but are all green and already starting to smell a little. yummmmmm. is that okay or is their growth stunted for another reason?

Your underfeeding them, promix bx has no nutrient value in it. I would try at least 1/2 strength and go from there. Doubt you will burn them

I recently did a grow with some autoflower blueberry seeds, the description of the seeds said that they were very nutrient sensitive, so I was careful, but as I found no problems, I slowly kept upping the ec. Have you got an ec meter or are you doing it without one? If you do have one, I started my ec at around 1.2 when they were 1 week old, and slowly upped it to 2.0 by the week before harvest, at which point they were just fed water for the final week flush.
And I can't imagine anything is stunting their growth, although you cant be sure unless I could see properly.
Hope this has helped
Thanks

As far as the half strength mr. ganja, do I use half strength Flowering nutes or Veg nutes? Blinkrock, No I do not have a ec meter or a ppm meter as I went way over budget on the lights and grow room setup so I have to wait until next grow to get them. I will feed them tonight but will wait til I get a response as to which schedule to follow, veg or flower. Thanks to all.