Ill be honest. Those are not the best choices for pc growing. The church especially since its a huge outdoor strain. You would get much better luck from an autoflowering strain such as lowryder. You will definitely need to train them if you are going to try and make it work.

An Overview of Cannabis Training (ScrOG, SoG, FIM, Supercrop, LST, etc.) - Marijuana Cultivation - Growery Message Board
That link has a ton of training methods and applications.

Expect them to double in size or more after you flip to 12/12.

Goodluck and keep growing!
GetThisOrDie Reviewed by GetThisOrDie on . My first indoor grow, CPU grow box Hey i have a cpu grow box that i bought online, it working nice i already started growing 2 plats, Church and Lemon Skunk seeds and they are doing great. I want to know when should i start flowering stege(from 24hour light to 12 hour light) for this plants because the space inside the box is very small u can see them in the pictures, btw i had been using 24 hour light, i have turned the light off yet, and they are growing hydroponics on water with the nutrient level between 750-800. Rating: 5