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What's the best way to build a grow box?

Grow Box Quiz

Hello Ron,

Thanks a heap for all the help. I have no choice but to build a grow box because of limited space. Iíve read your Q&A and pretty much substituted grow box for closet to help get myself started, but Iíd like to double check.

So far I have 4 Power Growers (sorry, I found your site after I bought them) and a 430 Watt Son Agro.

Iím planning on building a box and hanging the Son Agro at the top with a chain in which I can adjust the distance. Also, I will put in intake and exhaust fans.

The simple box: 2x4s and plywood lined with Mylar. Can you point out some obvious-to-you-but-not-me stuff that I MUST get, do, or not do before I start. Very limited resources where I live and I very much appreciate your input.


You need two boxes. one for the plants and a lower one for the reservoir. Like this.

Hi. I'm the guy who asked about the cannabis plant. I am thinking of making an ebb/flow system for my plants, for the simple reason that it would take up less veticle space than using the 2 litre system. I am gonna be growing in 4ft tall grow box, and the reservoir and grow tray alone are going to take up about 20 inches, so I need to spare as much room as I can. I am going to be using sterilized lava rocks in the grow tray which will hold six plants. I have 3 questions.

1. Will the 2 inch pvc hose connector that I am using to both fill and drain the system get clogged up by the lava rocks, and prevent the system from draining? If so, how can I prevent this?
No lava rocks should not clog up any size.
2. How often should I flood the system? I will be on a 24 hr. lighting schedule for veg. growth.
Every 20 or 30 minutes.
3. I want to try to use Miracle grow as my nutrient. What would be the best kind to use for growing buds?
I wouldn't use Miracle-Gro if I was growing pot. I would use a real hydroponics solution from any of the grow stores mention on this web site.
I know this is a lot of questions, but I want to make sure that I get everything right the first time. Thank you for your time.

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