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Building an Ultra Stealthy Grow Cabinet

This article comes courtesy of the good folks at seattlecannabisjournal.com, and was re-edited for clarity and ease of reading. Click Here to view the original article in all its glory!

The day I got a recommendation for medicinal Cannabis was a relief. This was followed by the knowledge and urgency that I needed to get some plants in the ground immediately.

This had been a long-time dream of mine, and I fondly imagined my first harvest, curing my flowers to perfection, and collecting their resin for concentrates. I saw myself carefully journaling their progress, and eventually becoming an expert caretaker of myself and my marijuana garden.

Then reality set in: I have a small space, in a small house, in a crowded neighborhood.

Momentarily discouraged, I quickly scrapped the idea of a dedicated room filled to the brim. I began with getting clear about my intentions; I wanted to inconspicuously and autonomously produce my medicine. This was a much more respectable and realistic goal, and one that I could embrace.

After months pouring over cannabis related text and furrowing my brow at various nooks throughout my home, I saw through the problem. I would build a stealthy grow cabinet!

On Craigslist I found a cabinet kit still in the box for only $35. It came in at 24″ L x 30″ W x 70″ H. Next, I purchased a 6″ inline fan for another $100. The fan combined with a 400 watt light and Cool Tube from a previous grow gave me something to design around.

My sights set, I loaded Google’s 3D rendering freeware, Google SketchUp, and got to work.

Sirius: Google SketchUp can be pretty tough to use without training, especially if you’ve never used it and you just want to design one thing. Rest assured: some paper, a pencil, a little math, and careful planning will work just as well!

The first thing to deal with was the Intake and exhaust – a clean environment and fresh air for my plants.

A rule with any grow space is to have the intake’s opening twice the open area of the exhaust’s.

Important: The opening for your intake hole should be about twice the size of your exhaust hole.

My inline fan with had 6″ opening (28 square inches) so I would need 56 square inch opening. I went with two louvered grills that were 5″ x 8″ which gave me 80 square inches – 30% for the louvers = 56 square inches. Perfect!

Sirius: This is a great point! In any enclosed grow area such as a tent or grow cabinet, it’s important to have a larger opening for intake than for exhaust. This will maximize the efficiency of your fan in addition to keeping it working for longer. Plus, this will keep tents from “bowing” in, reducing your grow space.

Of course I wanted to filter the intake air to keep out dust, pet hair, pollen, mold and the like.

Next, I faced the issue of providing my plants their light.

I chose a High Pressure Sodium bulb. Since these produce more light from the side(the long side as opposed to the plug and tip of the bulb), light coverage could be maximized by positioning them front to back. Some creativity was required to install the Cool Tube to keep my HPS bulb from becoming too hot.

We learned above that the cabinet is 24″ deep. Now this Cool Tube was 20″, hardly enough room to attach two 6″ flex ducts for ventilation without having to keep a door open.

Keeping a door open is not a viable option for the stealthy gardener like me! I decided to use some creativity.

The solution I came up with was to place the duct work outside of the cabinet.

I built and installed 4″ x 10″ x 48″ wooden housing for the duct work for the exhaust of the Cool Tube (picture 3rd down). Next, three 6″ duct flanges into the back wall of the cabinet leading into the duct work spaced vertically 9″ apart.

This allowed three different height settings for the light. The unused two positions are capped off. Take a look…

I installed a sealed fan room to house the 6″ inline fan mentioned above. This sat in the top inside of the cabinet, pictured below.

Now that my fan room was set up, I allowed the exhaust to escape upward into a carbon filter. I mounted the filter inside a Rubbermaid tote to make the whole setup more discrete.

A fan speed controller and light timer are mounted on the outside of the fan room.

Next to the fan room is space for other more technical things. Here we find the ballast and command switching station.

Also, I installed a “Kill-a-Watt” device to monitor my electrical usage so I can easily calculate the total extra cost to my electricity bill each month.

I vented this area with a 4″ opening that opened into the fan room.

When all was said and done I harvested 264 grams (9.3 ounces).

Final Harvest Weight: 264 grams (9.3 Ounces)

Cost: $1.64/gram

The final bounty boasted nine ounces of dried and cured cannabis flowers.

After the initial investment, $1.64 was my total cost per gram when I factored electricity, carbon filter, and nutrients.

Affordable medicine is a right, and medicinal Cannabis sets a standard for patient autonomy. Enjoy producing your own medicine.

Sirius: This is definitely an advanced method of creating a grow box, but he makes sure to include a lot of things one needs to consider when creating one, such as ventilation and making sure to leave room for everything you need. Do you have a better/more practical/more efficient design? Let us know so we can share with the world!

See Another Stealth Grow Cabinet in Action and Build Your Own!

Was the cabinet in the above article a little too much for your sensibilities? Then check out these pics by one of our awesome readers!

Make sure to click each one to see the full size picture.

These pictures were sent in by one of our readers who has taken a far more simple/easy approach to making a grow cabinet than G.D. Bud. Here’s what he had to say about it:

“1st time grower. Plants are 1 month old, and 12″ tall now. Set up for less than $250. Used cab.w/4 bulb, 24″ T5’s, 4″ elec exhaust, Thanx for great info.”

Use the following items to make a stealthy grow cabinet just like his:

  • Old cabinet
  • Line inside of cabinet with mylar (reflective material)
  • Hang T5 grow light to inside-top of cabinet with rope rachets
  • Cut 12″ hole in back (near bottom) for cool air intake
  • Attach air filter to your intake hole if the outside air is dusty (and to protect your grow cabinet from any stray bugs)
  • Cut 4″ hole out the top to use as an exhaust hole (cut a bigger exhaust hole for a bigger cabinet, or if you’re going to intall more/bigger/hotter lights)
  • A 4″ exhaust hole uses 4″ ducting with fan to pull out hot air (drawing in cool air in through your intake).
    Remember, fan should be pointed up, to pull hot air out of your cabinet!
  • Now you just add plants!

See how one grower built his own stealthy grow cabinet (in pictures), then learn how to build your own!

5 Best Stealth Grow Box Systems For Your Flowers in 2021

By Brian Cusack
on August 11, 2020

With the legalization and rapid rise of legal forms of cannabis all around the world, grow cabinets or grow boxes are now a heavily sought after product.

When we say legalized cannabis we are not talking about marijuana we are talking about hemp. Although these grow boxes can also grow marijuana however this is illegal in most countries around the world.

In general, people think about hemp if you say legal cannabis. CBD oil is derived from the cannabis strain hemp. Here, we will advise you on the best ways to grow hemp at home. Stealth grow boxes or grow cabinets using hydroponic systems are the ones you use when growing hemp at home.

We will look at some of the best stealth grow boxes, cabinets & tents available on the market right now.

Let me say this, legalization of cannabis doesn’t carry the same set of rules and regulations in all countries. In some cases including most of Europe, a license is required to grow hemp in your home.

5 Best High End Grow Boxes

Below I have listed my top picks for stealth grow boxes & cabinets based on quality, convenience and privacy.

Product Size No. of Plants
#1 The Winner Grobo Premium Automated Grow Box (US, UK, Canada & EU) 14″ wide x 14″ deep x 48″ high 4
#2 Super Trinity Smart Grow Closest (US only) 72” wide x 24” deep x 72” high 24
#3 SuperNova Smart Grow Closet (US Only) 46″ wide x 24″ deep x 78″ high 12
#4 SuperFlower Smart Grow Closet (US Only) 36” wide x 24” deep x 72” high 16
#5 Growzilla 4 Plant Vertical Hydroponics Grow Box (US Only) 24″ wide x 16.5″ deep x 68″ high 4

#1 The Winner: Grobo Premium Automated Grow Box (U.S, Canada & Europe)

If you want to grow hydroponic plants without the mess, privacy concerns, and guesswork of traditional growing, Grobo’s stealth grow box is the perfect option. Growing plants usually requires a ton of time and knowledge if you want to produce healthy, high-yield plants. So, most people find it difficult to grow their own plants.

Now, there is a solution, with a Grobo stealth box, the average person is able to grow like a professional discreetly in the comfort of their home. Take a look at our review of this innovative growing system to learn how to get your own, set it up, and get started.

  • High quality yields up to 3oz every 4 months
  • Contains smell reducing carbon filter for discreet growing
  • Does not take up much space compared to the SuperTrinity
  • Free Shipping
  • Very Expensive
  • Yield is a lot smaller than the SuperTrinity

#2 SuperTrinity Smart Grow Closest (U.S. Only)

The SuperTrinity Grow is built to last & offer extremely high yields. This three chamber, dual cabinet system is designed to offer a perpetual cycle grow with maximum output.

This is one of the most lavish and sophisticated grow boxes on the market and certainly the most expensive. The SuperTrinity Grow box can be used to grow your favorite herbs straight out of the box.

It comes with all the accessories that are required to start the herb growing process. App integration allows you to have complete control of lighting time and water schedule from the comfort of your phone.

Above all, this is a fully automated stealth grow box with two sets of 16-plant hydroponic systems. You also get the warranty on all parts and tech support for a lifetime.

Shipping: Available to be shipped to the U.S. only at this time.

  • Biggest grow box on the market
  • Holds up to 24 plants
  • Dual activated carbon air filtration per closet ensures no smell
  • App integration allows complete control over water and light schedules
  • By far the most expensive grow box on the market
  • Although it can hold up to 24 plants this means the unit is very big and takes up a lot of space.

#3 SuperNova Smart Grow Closet (U.S. Only)

The SuperNova Smart Grow Closet comes with every item you need to grow your plants. It comes with timers, air filters, nutrients, and growing medium.

Shipping: Available to be shipped to the U.S. only at this time.

  • High yield – 12 plants at a time
  • Control everything from an app on your phone
  • Two chambers which will allow perpetual growing
  • Discrete growing
  • Very expensive
  • Takes up a lot of space

#4 SuperFlower Smart Grow Closet (U.S. Only)

The SuperCloset SuperFlower 3.0 is made with a 16 gauge steel which makes it easy to secure. The grow box is designed for easy use, making it great both for amateurs and professionals.

It also provides a decent airflow with its adjustable circulation and exhaust fans which provide air through a carbon filter. This Grow Closet is the perfect choice for those looking to grow tall plants you want to grow indoors. At 36” wide, 24” deep and 72” high, this is the perfect option for the taller plants.

Shipping: Available to be shipped to the U.S. only at this time.

  • Perfect for growing tall plants
  • High yield – 16 plants at a time
  • Discrete growing
  • Can be controlled from an app on your phone
  • Expensive
  • Takes up a lot of space

#5 Growzilla 4 Plant Vertical Hydroponics System (U.S. Only)

The Growzilla 4 is one of the best grow boxes in 2019. It is an improved version of the previous 3.0 model made to grow healthier, bigger plants.

Shipping: Available to be shipped to the U.S. only at this time.

  • Lifetime warranty
  • Perfect for tall plants
  • Comes with everything except the seeds
  • No lifetime warranty on the light
  • No where near the quality of the above five options

6 Best Stealth Grow Boxes For Under $1000

Stealth grow boxes can be very expensive this is why we have compiled a list of the top 5 stealth grow boxes for less than a $1000

Product Size No. of Plants
#1 My Recommendation Stealth Grow Box (UK & EU Only) 18″ wide, 16″ deep & 35″ high 2
#2 SuperBox LED Smart Grow Box (US Only) 18” wide, 24” deep & 30” high 2
#3 6 Clone LED Hydroponics Grow Box (US Only) 16″ Wide, 11″ Deep & 28″ high 6
#4 Grandma’s Secret Garden 5.0-4 Plant Hydroponics Grow Box (US Only) 24″ wide, 16.5″ deep & 36″ high 1
#5 Hellogrower 40″ Tall Stealth 300 Watt LED Grow Box (US Only) 40″ high 1
#6 Cash Crop 6.0-2 Plant LED Hydroponics Grow Box (US Only)

#1 Stealth Grow Box – Hydroponic CFL Grow Box (Europe & U.K. Only)

If you’re based in Europe, Stealthgrowbox.co.uk could be your best bet. Their grow boxes offer the most competitive price/quality ratio at Europe and UK level. The yield will amaze even the most experienced grower, and you can choose from several add-ons for a smooth growing experience (temperature and humidity sensor, nutrient sensor, webcam, LED/CFL lights, etc).

Stealthgrowbox.co.uk is based in Europe and has been operating since 2012. They have experienced steady growth in business and serve markets in Europe (Free shipping) and the UK with plans to soon extend to the USA, Canada and Australia.

Right now, they provide wooden LED / CFL stealth grow boxes for all kinds of plants or herbs and have a variety of options (in terms of size, colour, and add-ons) to suit various requirements.

In 2020, based on customer research, Stealthgrowbox.co.uk launched it’s branded 3D Printed Carbon Filter – a great addition to any grow system, as it significantly reduces odours and contributes to a great growing environment for your plants.

They also build custom grow boxes, so if you can’t find what you’re looking for, reach out to them as they could be able to build your dream grow box.

There is simply no other choice but stealthgrowbox.co.uk if you are located in Europe or UK.

Shipping: UK & EU shipping only

Thinking of buying a herb stealth grow box. Have a read of our top findings and figure out which stealth indoor grow box is for you…