I attached a drawing of the basic design for my first growbox. I live in an apartment with one roommate who wouldn't be down with the situation, so smell is a big concern for me. I tried to show in the drawing that every wall (including floor and ceiling) will have a false-wall compartment with about 1/8â€-1/4â€ of activated carbon. There will also be a couple layers of heavy-duty plastic on the inside of each wall, and every corner and crack will be filled with silicone caulk. That being said, I have a couple questions. With those dimensions, will I have enough room to grow one or two healthy White Widow plants? I've read that their max height is supposed to be about two feet, but I've also read plenty of posts from people saying that they got much bigger. I was planning on cutting and bending to make shorter, bushier plants, but I'm not sure if there's enough width and length to the growbox (1'3â€ wide x 3'1â€ long). With the walls all having been filled with carbon, an activated carbon filter running at all times, and an airtight seal on the compartment, will I have to worry about smell at all with two flowering white widows? Activated carbon isn't that expensive and I have no problem with overkill (as long as I'm protected), so I could always add more if needed. I will also be using the compartment to dry the herb after harvest. Will the box be â€˜smell-proof' enough for drying as well?