Reeferman Genetics –  Chapter 3 – Grow Top Shelf Buds

This is chapter 3 of a 14 part weekly series talks about the location and construction of your grow room. Follow step by step to grow top shelf harvests like a pro. The information and instructions are highly scalable. These proven and well developed methods and technologies will work for anyone. Whether you want to grow some personal crops of buds at home or if you intend to fill a warehouse.

Choosing a Grow Room

Cannabis Grow RoomDo not underestimate the importance of choosing the right spot to set up your grow in. Grow rooms are a significant investment of money and time. Having to relocate or run into severe limitations because of where or how you set up can mean game over. Especially if you have not been able to realize a harvest after putting out all that time and money. Location and construction will help insure you realize a harvest.

An unfinished basement, industrial space, insulated outbuilding or insulated shipping container(s) are good choices for your set-up. Spare rooms adjacent to living areas are not recommended. You want to be able to isolate the growing area from everyday living areas. Attics are not convenient to access, are typically cramped in space and easily overheat.

Depending on your climate, a greenhouse can also be a good choice. However, a greenhouse has little in the way of security or privacy. In most North American regions, a professional grade greenhouse is feasible for growing high quality cannabis during spring through early autumn. Winter in most regions, the heating and lighting bill for a greenhouse can exceed what it would cost to grow indoors, solely under lights. You may also face a lot more hardships versus growing indoors where your crop is better protected.

You may consider contacting a trusted contractor for construction, or if you are handy, you might frame in your own walls and ceilings, etc.


Cannabis Growing Room space efficiencyElectrical work is best left to professionals. However, as far as power goes, they do not need to know your business. You just need dedicated electrical circuits run to the growing area; professional grow room controls and equipment are very plug and play.

Simply, you just need an ample, safe, and reliable power supply installed for your growing area. What you do with your power supply is your own business.

Remember, for an eight by twelve foot bloom room you will need a minimum of 40 amps of dedicated 240/220 volt power supply. For your four foot by six foot veg and propagation room you will need two 15 amp 120/110 volt power supply circuits to keep your bloom room productive and constantly harvesting.


Access to a clean and fresh source of water is essential. For each light you operate in your bloom room, count on using at least five gallons of water daily. Lugging buckets of water around gets old quick and is murder on the body and buildings with spills and sloshing over. Choosing the right location and construction is critical to success.

Water quality counts. Especially with hydroponic growing methods. There is much that can be done to improve water quality if you have an ample supply. Typically, most municipal supplies will just need sediment filtration and dichlorination for use in hydroponics. Although Reverse Osmosis filtered water is always best. We will cover water quality and filtration methods in greater detail later.

Wall Coverings

Cannabis Grow RoomGrow rooms should be well insulated to deaden sounds and to help keep environmental temperature control efficient. The location and construction you choose will make it easier to achieve these goals.

There are any number of good ways to cover framed walls for growing purposes. Modular insulated polymer panels that snap together with little or no framing required are available. For most growers, covering two by four insulated framing with 6 mil vapor barriers. Add a sheet of plywood treated with oil based primer and painted with flat white latex. This provides lots of durability, good light reflection and a long service life. Tacking black and white poly to the wall is not a good option. It is not durable and does not last, leading to damage to the surfaces it is supposed to protect.


Having a floor drain or sump is a bonus and will make your life a lot easier and less worrisome. You will be adding and draining water and nutrient solutions on a regular basis, so a concrete or durable waterproof floor covering is a must. Avoid epoxy coated floors. Some of the VOCs (volatile organic compounds) that occur as off gassing can harm your plants. Bare concrete or painted concrete floors work great. Shipping container floors can be covered with plywood and lined with linoleum or what works for you and your budget.


Continue reading Reeferman Genetics – Grow Top Shelf Buds” by clicking on a chapter below.