hi hows you, a few things id pick up on
1 i have got the same aerogarden and i only used it for 1 plant that i was taking clones from, you wont have much room in the aerogarden for all the plants,
2, you would find it a lot easier growing in pots and you would get a lot bigger plants,
now are you using nutrients if so what are you using.
i wouldnt mess around with the auto to much, any pruning will make the plant focus its growth on growing new leaves and this slows down the total growth of the plant.
so for the next grow id scrap the aero unless you was going to do just 1 plant in it, 1 of my plants would fill the whole of the aero garden and you will have loads of roots growing in their as well with all them plants.
if i was you and you are planning on using the aero till the end then id flip the lights to 12-12 now else you really will run out of space, you wont know sex just yet you probably wont be able to tell untill around week 2 of flower, so if your planning on using the aerogarden till the end then id flip it to flower now and leave it at 12-12, not sure how your going to get the aerogarden hood to do 12-12 though, what i did to mine was get an old stereo power lead and plug this into the hood as its the same fitting then plug that into the timer then the lights and pump would work on their own plugs instead of the same plug.
with my aero garden i found the pump pumped to much water onto the roots and this caused my plants to be deformed so what i did was cover the terminals to the pump and i added an air stone into the bottom of the res, so it basically ended up been a bubble cloner type grow, so the pump wasnt working at all and my plant grew better for it, how ever i only used it for clones once then scrapped it as i didnt like the way it looked.
you wont grow many plants with the aerogarden due to its size its ok for salad stuff and things like that but these plants get big and spread and they will soon be fighting for light and space.
so next time round id buy some plant pots 3gallon and then wire up the lights in the cupboard you are now using and get rid of the aerogarden or use it for starting clones, how ever i found the pump pumped to much water even at its lowest setting and this was drowning the plants and making the plant very pale, but its just an idea for you, but using pots you will have enough space for hte plants to grow and you will find it easier to keep in check.
but id flip the lights to 12-12 now, they wont start flowering till they are mature enough so they will still grow a while before starting to flower, but if you dont flip them now you will end up running out of room and will need to remove some plants to give 1 of them room to grow and flower properly. but if you was using pots they would be able to get much bigger and you will get more from them.
12-12 from seed, i tried this but my plan was to end up with a plant with 1 big bud, so i grew a 2ltr dwc hempie, what this basically is is growing in a 2ltr pop bottle, you cut the top off one bottle and use that for compost and to start the plant in, then the bottom of the bottle is a res, ive got 2 going now if you want to check my journal, you may need to go back a few pages to find the pics, but 12-12 from seeds takes around 8 weeks to finish from day 1 and you will only get 20g per plant, but it only uses a small space and turn around times are quick, so if you did 10 of these every 8 weeks 12-12 from seed you would end up with 200g every 8 weeks, but if you planted 10 plants every 4 weeks then you would get 200g every 4 weeks,
so ive got 4 plants growing in 3gallon pots and 2 plants that are in 2ltr pop bottles, ive also got clones and seedlings growing in my small grow cupboard.
ive got to admit though your plants look healthier than mine did in the aerogarden, i just found that i needed to wire up the hood on its own so i could set the light using a proper timer and the pump was to much for the plants, yours look ok, the chances are moving them now would stress them, so id flip to 12-12 now and get these out the way, you could even get some seeds started and get them ready for next time round, what i try and do is have some plants in flower then in the small cupboard i soak seeds and cuttings and then let them veg in this cupboard while i finish off flowering what i got in flower, that way once the plants have been harvested i have got more to move in that have been vegging for say 2 or 3 weeks, this keeps the turn around time down and keeps the grow going, i also buy autos and grow and flower them while im growing my other plants, so ive constantly got bud for myself and some to harvest evey 3 or 4 weeks.