Split the room into two rooms by framing out a 7' long dividing wall using 2x4's as well as creating a rough opening for a 26" wide interior door between the two rooms. As you enter the shed you will stand in the front veg/control room which should measure 3x7... the flower room will be the next room and should measure 7x7... The idea is that you will be flowering in a 4x4 flood tray which should be up against the back wall with approximately 18" on either side of the tray and approximately 2' between the center wall and the forward edge of the tray. Also, before you close up the walls you will need to run your electrical system. Once all that is done then you can move forward with choosing things like water systems, lighting etc. Make sure you insulate the shed and center wall well!! Hope that helps in getting you started. keep me posted and when your ready to move forward let me know.After many years of keeping chickens, I disided to quit. I cleaned everything up and painted the shed. After Im done framing, insulating, drywall, and taping, the inside will be 7' X 10'. I woukd like to create 2 rooms, small veg and large bloom but I haven't designed a room like this before. If you could design the ultimate setup, how would you do it? Only rule is the entry is on the 7' end. Thanks