Controlling mothers growth. How do I keep them smaller?

[spase]

I've got a few clones going. I'm keeping them in small pots - about 1', and I'm planning on toping to limit the vertical growth a little. What more can I do to keep these from taking up too much space?
I've got them in soil. Coco loco for now. They've got their own room. It's small - about 36x36x77. I put in a shelf about counter height they sit on. I've got 4 in there for now. I plan on having 2 or 3 most of the time, plus cuttings to go into the flower room.
The cloning process has been relatively smooth. 100% success rate.

 

[Grownsince95]

Keep the light and food moderate, and don't transplant to bigger pots. Fabric containers let the roots air prune and keep the plant from circling the pot which allows for a healthier root ball.

The plastic ones you're using will eventually require you to re-pot and do some root pruning. At that point I would switch to 2gal fabric. You can keep Mom's in them for a long time. Usually by the time they get unhappy you've taken enough cuts off them to start 5 more mothers anyway.

Then Mom goes into the flower tent and the process begins again!

 

[spase]

These are the 1st clones. I put the original mothers into the flowering room. Maybe I'll continue that for now.