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Hydroponic Grow Box

The Silverback EC | 4' wide x 6½' tall x 2' deep

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Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Hydroponic Grow Box | The Silverback EC | 4' wide x 6½' tall x 2' deep Shown with our optional iPonic WiFi Controller System Shown with our optional WiFi Grow Controller Cool weather Thermostat shown in our Halfback model New for 2017, add up to another 40 degrees of heat to your EC grow box!

Cool, heat, humidify and dehumidify all in one cabinet!

Designed to work in a wide range of conditions, the Silverback Environmental Control (EC) Grow Box performs in some of the toughest environments. With an operating range of 10-97 degrees fahrenheit (room temperature), you can place your Silverback EC in a garage, attic, basement etc and it will maintain the perfect grow temperature.

We heavily modify the internal Heating/Cooling Unit making it a closed loop system thereby maintaing guaranteed odor control. When in Cooling Mode any purified overflow water is pumped back into the Hydroponic Systems Backup Reservoir via the modified sump pump. A wireless system Remote Control along with a custom matched Glide Frame are also included.

Feel free to add the optional Humidifier PRO for drier environments. To enjoy a perpetual grow, add a Little Kicker Cloner to your EC Box.

Just like our regular Silverback, the Silverback EC is big and potent! Measuring 4 feet wide and 6½ feet tall, Grow Box USA's Patent-Pending, handcrafted in the USA, Silverback EC is not for the faint of heart! With up to 480 Watts of potent LED lighting available, you can count on the Silverback EC to produce heavy fruits and vegetables along with massive yields. Just like all Grow Box USA's cabinets, this grow box is completely turn-key, is whisper quite, runs extremely cool, leaks no light and guarantees 100% odor control!

New for 2018! Add another 40 degrees of heat to your grow box with the Grow Box USA exclusive Cool Weather System! This works just like your house, set the thermostat and forget it. We have also upgraded our Duo Drive LED diode specs plus have added as an option the Grow Box USA Aero Hydroponic System!


This feature is exclusive to Grow Box USA!

Large Grow Chamber with Advanced LED Lighting

Learn more about guaranteed results with our advanced LED lighting. »
Our standard LEDs are not your typical UFO lights. These LED lights feature 9-way, 3 watt diodes, deep penetration lenses, an aluminum chassis, the most robust power supplies and double ball bearing cooling fans. For maximum yields select our optional Duo-Drive series of switchable (veg or bloom) 5 watt diode LED light. These are absolutely the best LED grow lights money can buy! Learn more »

This feature is exclusive to Grow Box USA!

100% Odor Control Guaranteed with Our Patent-Pending Air Scrubbing System

Our air scrubbers stop even the worst plant odors from escaping your box! Every Grow Box USA cabinet features our patent-pending air scrubbing system guaranteeing 100% odor control. No other manufacturer can match that! Learn more »

100% Light Containment

We seal our cabinets so 100% of light is trapped within. Learn more »

Extremely Quiet & Energy Efficient

The grow box includes 10 whisper quiet exhaust fans, dual circulation fans and costs less than $40 a month to run.

This feature is exclusive to Grow Box USA!

Fully Automated - Lights, Fans, CO2 System, Hydroponic System and PH Controller

We are the only manufacturer to offer a fully automatic PH up and down adjusting system, allowing you to leave your grow box unattended for up to 14 days. Learn more »

Complete Environmental Control

Heats, cools, and dehumidifies standard. Add the optional Humidifier PRO for drier environments.

Optional iPonic WiFi Controller System

Monitor and control your grow from your computer, laptop or smartphone!

Humidity/Temperature Monitor

Glide Frame Standard

Move your cabinet with one finger!

Dual Circulation Fans

This feature is exclusive to Grow Box USA!

Plant Dryer/Curer

All our grow boxes make excellent odor proof dryers! When you harvest, simply remove your lights and reservoir. Then hang your plants from the light hooks. During the three to five day drying period, all odors will be removed -- so your house will never smell like curing plants!


81 Watt COB LED Side Lighting

New for 2018! Add this opton for a wider grow band and heavier yields.

Potent and Easy-to-Use Hydroponic System

Our Grow Box USA Deep Water Culture/Drip Feed Hydro System is extremely potent yet very easy to use. Learn more »

Double Layer Reflective Mylar

This feature is exclusive to Grow Box USA!

Water Chiller in Main Reservoir

Our patented internal Water Chiller keeps your water below 70°F so your plants avoid rot and diseases caused by warm water. Plus it keeps the oxygen level at optium so your plants grow at their maximum possible rate! Learn more »

This feature is exclusive to Grow Box USA!

Internal CO2 System Included

By using our included CO2 system, your plants will grow up to 30% faster and produce heavier yields.

Real Outlets with GFI Protection

Wired for safety, equipment protection, ease of use and a neat appearance. Learn more »

Three Point Door Lock with Keys

16 Gauge Welded Frame

Instructional DVD plus FREE Exceptional Grow and Technical Support

With 25+ years of growing experience, count on our team to provide you with superior after the sale support to ensure you get great results! We'll help you become a grow expert in no time.

Hand Crafted in Altoona, Wisconsin

Parts Warranty

Five year warranty on the box itself, three years on the LED Lights plus a one year warranty on everything else.


Parts List

(3) 90 Watt, 9-Way, 3w Diode, Deep Penetration LED Grow Lights (3x135w available)

(720 Watt, Switchable, 11-Way, 5w Diode Duo-Drive LED Light optional)

Multi Position Light Hangers

Optional T5 or LED Side Lighting

Fully Automated including Lights, Hydroponic System, Water Cooler, CO2 and Fans

Full Climate Control: Heat, Cool, Dehumidify

Humidifier PRO Optional

Remote Control

Exclusive Automatic PH Adjusting System Available

Grow Box USA® Patent-Pending Air Scrubbing System; Guaranteed 100% Odor Control

(10) "Whisper Quiet" Exhaust Fans

9 Plant DWC/Drip Feed Hydroponic Reservoir

Grow Box USA® Hydroponic Aeration System

Backup Reservoir

Float Valve

Patented Zero Maintenance Water Cooler

(2) Water Pumps

(1) Bag of Premium Hydroton

(24) Rapid Rooter Grow Plugs

Grow Box USA® Plant "Low Stress Training" Kit

Temperature and Humidity Monitor

(2) AAA Batteries

AquaPro AP-1 TDS Meter

PH Adjusting Kit

Dual Circulation Fans and Magnets

(3) Dual Outlet Grounded Timers

Internal CO2 Boost Bucket System

GH FloraDuo A and FloraDuo B Nutrients (1 Quart Each)

Professionally wired with GFCI Protection on all electrical outlets

100% of Light blocked inside

All Steel construction

16 Gauge welded Frame

Three point locking door with (2) Keys

Instructional DVD and written Instructions

Lifetime Expert Grow and Technical Support

15+ Year Life Expectency

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Frequently Asked Questions

How much is shipping on this product?

Ship your grow box anywhere in the continental US for one low rate! For international orders, please email or call for a quote. Curbside delivery* (end of your driveway) is standard while inside delivery (inside your garage) is available for an additional $75.

Most orders ship within two to three business days by standard freight.

Standard shipping rates for grow boxes sent to the continental US:

Ship your Silverback for just $374 (Freight)

International shipping available:

Austria $800*
Australia $1200*
Canada $850
Ireland $800*
Germany $800*
Kuwait $850*
Malta $850*
Norway $850*
Thailand $850*
UK $1000
US Virgin Islands $900

Other locations are available, please email for quote. If an order is submitted without international shipping included, we reserve the right to add the additional fee to the order after the sale is complete.

Orders shipped outside the lower 48 US states or Canada are shipped in heavy-duty shipping crates to protect the cabinet during the journey to you!

International pricing normally includes curbside delivery to your address. International customers may be responsible for any additional costs such as (but not limited to) duty, warehouse, and customs charges. A 600 Watt or greater power inverter is required in some countries as all cabinets are US standard 110v 50/60hz (We offer a 1500 watt power inverter with surge protection).

* Residential delivery is not available in all countries. Customer may need to pickup or arrange delivery from closest available freight station.

How much space does my new cabinet need?

All Grow Box USA cabinets need just two inches of space on all sides and 6" up top. Our cabinets can be placed in a very small area as long as the room is properly ventilated.

What temperature does the room have to be to use the grow box?

Our grow boxes are designed to operate with room temperatures as low as 63 degrees and as high as 80 degrees Fahrenheit, depending on model.

Your competition told me that your grow boxes allow mold to form under their mylar. What's the scoop?

This is absolutely false! No, mold does not form under our reflective mylar nor anywhere else in our grow boxes. We tape all our seams and every square inch of our mylar is glued into place. There is simply no way for moisture to work its way behind our mylar, even if you spill water directly in the cabinet. We just disassembled our first prototype, after 3 1/2 years of use there was absolutely no moisture or mold behind the mylar.

What can I expect for a yield from my new cabinet?

Your yield depends on what type of plant you are growing. A general rule of thumb is The Misty grow box can produce 1-2lbs of dried fruits/vegetables annually, The Classic grow box can easily produce 10lbs+ of usable plant matter annually, and The Fullback and Silverback grow boxes produce even more!

Why do you offer a net trellis system with your grow tent but not with your grow boxes?

We recommend using the "Low Stress Training" technique instead of a net trellis with our grow boxes. With Low Stress Training, you bend your plants into the corners and tie them down; this allows you to control where your plants grow. This technique allows you to use every square inch of your grow box, with a net trellis you have very limited control. A net trellis works great in a large tent where you don't have the time to tend every plant individually. Our competition uses net trellis as a sales gimmick with their grow boxes; we are aware we may lose a sale or two because we don't offer a trellis in ours, but we will not sacrifice performance just to make a buck.

How many plants can I grow in my grow box?

Our competitors claim you can grow up to 16 plants in their main chamber and up to 50 clones in their cloning chamber yet their box is smaller than our Fullback... this makes no sense. The fact is they are exaggerating just sell their product. At Grow Box USA, we never mislead and always pass factual information on to our customers.

The Silverback Grow Box: 7-9 plants, 24 clones
The Fullback Grow Box: 6-8 plants, 12 clones
The Stanley Grow Box: 6-8 plants, 12 clones
The Desa Grow Box: 4-6 plants, 12 clones
The Halfback Grow Box: 7-9 plants
The Misty Grow Box: 2-4 plants

Do I need to use a power converter?

If you live in the USA or Canada, simply plug your grow box into any standard outlet. A power converter/regulator will be needed for international customers. For your convenience, we offer an extremely high quality power converter/voltage regulator at a great price. Simply select this option on the right when you order your grow box or tent.

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100% Odor Control

Completely Turn-Key

Just add seeds and water! The grow box comes with everything you need for your first two grows including all nutrients, PPM meter, pH adjusting kit, instructional DVD and more!

Box Color:


Main Lighting

Upgrade the main lighting from 180 Watt LED to 270 Watt LED (FREE)

Upgrade the main lighting from 270 Watt LED to 405 Watt LED ($150)

Upgrade to 480 Watt Duo-Drive LED (Switchable, 5 Watt Diodes) ($400)

Hydroponic Options

Hybrid DWC/Drip Feed Hydroponic System (FREE)

Remove the Hydroponic System ($-200)

Premium Features

Humidifier PRO ($500)

Auto pH System ($675)

Internal WiFi HD Cab Cam ($140)

External WiFi HD Cab Cam ($100)

International Power Converter ($199)
Not needed in the US or Canada.

$4,900 + $99 SHIPPING in March! (Save $350!)
Grow box ships in 7 to 10 business days.

View FAQ tab for international shipping rates.


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