Just a side note for you Flying....the GDP prolly will not turn purple, it is the "greenest" of the purple strains. I have grown it outdoor twice and the only reason it purpled for me was due to cold temps....I mean near and below freezing. I had two plants last year of the GDP, one I took before it purpled, and the other I let stay out for another week, in the cold, it purpled, but we were just discussing last night how that plant prolly should have been taken with the other, as it did not get any stronger and possilby is not as strong.
Good luck with your girls. They look a bit shocked from transplant, but that will pass.
The reason folks transplant so much, is the root system. The plant will take it's time filling the larger pots with roots, and the upper part of the plant grows slower as it does this. If you transplant to the smaller then bigger pots the above ground plant grows more, I have found (with seeds I go, peet pellet, $3.00 a pack, then a four inch pot, then a gallon, then outside into the big pots, 15-45 gallons, by then they are about 20 -24 inch tall). And you can use some inexpensive B12 (blue bottle, maybe it is B1) during the transplant, I personally never experience the wilt that transplanting can cause. I use a capfull with five gallons fo water, using it to moisten the soil before transplant and after.
"Filling the pot with roots" does not mean it is root bound. Root bound means there are MASSIVE amounts of roots (mother plants sometimes experience this as they are in the pot so long), and this begins affecting the above ground part of the plant. A good root system, that fills the pot is what you want, using the smaller then graduating to the larger gives the roots chance to fill out..so to speak, into the area that is absent roots. Good root system means you will have more roots available to take up nutes, therefore a healthy happy MJ plant. Indoor may be a different story tho, and so this many transplants may not be wanted or needed as the roots will not be supporting a huge plant. Roots tend to head out away from the stem area/center, and will encircle the outer edge of the pot.
