Hydroponic Grow Box
The Silverback | 4' wide x 6½' tall x 2' deep
 Two completely seperate grow chambers; grow your clones at the same time your main crop is fruiting/flowering!  2014 Model Shown. All 2015 full size Grow Boxes now have the dropped floor for an extra 4" of grow height!  100% of light is blocked inside and all our boxes are whisper quiet!  Nothing hangs off the back of a Grow Box USA Grow Box!  Shown with Standard DWC/Drip Feed Hydro System.  Our exclusive backup reservoir and zero maintenance water cooler make for the most stable hydroponic system you can buy.  Our new for 2017 optional Duo-Drive Switchable 5 Watt Diode LED Lighting!  New for 2015! We have dropped the floor 4" allowing more room for your plants!  Shown with our optional WiFi Grow Controller  All Hydroponic Grow Boxes are completely turn-key inlcuding CO2; just add seeds and water!  Featuring two completely seperate grow chambers each with its own Patent-Pending Air Scrubbing system. 100% Odor control is guaranteed!  Less than 8 weeks into our latest Duo Drive Cherry Tomato Grow!  Amazing Cherry Tomatoes less than 9 weeks from seed!  Week 9 from seed, amazing Cherry Tomatoes!  Day 49 of our Fullback Cherry Tomato Grow, look at those healthy roots!  View your grow remotely with the Grow Box USA Cab Cam!  Cool weather Thermostat shown in our Halfback model  New for 2017, add up to 40 degrees of heat to your grow box! |
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Our largest hydroponic grow box! 4' wide x 6½' tall x 2' deep
This Handcrafted in the USA stealth hydroponic grow cabinet is big and potent! Measuring 4 feet wide and 6½ feet tall, Grow Box USA's patent-pending Silverback is not for the faint of heart! Just like all of Grow Box USA's cabinets, the Silverback is completely turn-key, is whisper quite, runs extremely cool, leaks no light and guarantees 100% odor control!
Don’t settle for a cheap inferior product, the Silverback is loaded with standard features not found on our competitors’ products. Features such as our patented main reservoir Water Chiller, up to 480 watts of potent, cutting edge LED lighting, optional LED side lighting, CO2 system, patent-pending and 100% effective air scrubbers, real outlets with GFI protection, extremely quiet operation and much more!
Also standard are separated propagation and fruiting/flowering chambers allowing you to increase your annual yield by having clones grow at the same time your main crop is fruiting/flowering. This means nearly twice as many harvests every year plus you are able to keep your plants genetics for life!
The Silverback can also be purchased as one massive single chamber that uses all that space for fruits or flowers! The single chamber version also comes with 56 watts of LED Side Lighting standard (at no extra cost!)
For cool weather climates add up to 45 degrees of heat to your grow box with the optional Grow Box USA exclusive Cold 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 our Grow Box USA Aero Hydroponic System!
 
Flowering/Fruiting 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 lights. These are absolutely the best LED grow lights money can buy! Learn more »
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 six whisper quiet exhaust fans, dual circulation fans and costs less than $30 a month to run.
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 »
Optional 81 watt COB LED Side Lighting
New for 2018 add side lights for a wider grow band and bigger yields!
Optional iPonic WiFi Controller System
Monitor and control your grow from your computer, laptop or smart phone!
Dual Circulation Fans
Humidity/Temperature Monitor
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!
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T5HO Cloning Chamber Lighting with Cloning Tray, Humidity Dome and Inserts
Increase your annual yield by growing clones at the same time your main crop is fruiting. This means nearly twice as many harvest every year and you are able to keep your plants genetics for life!
Potent and Easy-to-Use Hydroponic System
Our Grow Box USA exclusive hybrid Drip Feed/Deep Water Culture Hydroponic System is user friendly yet extremely potent! Learn more »
Double Layer Reflective Mylar
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 optimum so your plants grow at their maximum possible rate! Learn more »
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 with 16 Gauge "Piano" Style Hinges
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 the Box itself, three year warranty on the LED lights plus a one year warranty on everything else.
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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
Fully Automated including Lights, Hydroponic System, Water Cooler, CO2 and Fans
Exclusive Automatic PH Adjusting System Available
Grow Box USA® Patent-Pending Air Scrubbing System; Guaranteed 100% Odor Control
(8) "Whisper Quiet" Exhaust Fans
(2) "Whisper Quiet" Intake 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
Grow Box USA® Plant "Low Stress Training" Kit
Isolated Propagation Chamber with dedicated Air Scrubber
(2) 24 Watt T5HO Grow Lights (with vegetative bulbs)
Cloning Tray, Humidity Dome and Inserts
Rootech Cloning Gel
(1) Bag of Premium Hydroton
(24) Rapid Rooter Grow Plugs
Air Pump with Airstone and Air Line
Temperature and Humidity Monitor
(2) AAA Batteries
AquaPro AP-1 TDS Meter
PH Adjusting Kit
Dual Circulation Fans and Magnets
(4) 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 with "Piano" style Hinges
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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