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Riverstone Monticello Quick Assembly Greenhouse


Our price: $2,099.00


A great starter or grower greenhouse with polycarbonate walls and roof. Extend your growing season with this easy-to-assemble, efficient greenhouse that’s made in the USA! read more

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Lead time: 3-5 Business Days

Our price: $2,099.00


If your winters are long and cold, be sure you choose a greenhouse like this one with durable twin-walled polycarbonate panels.

The Monticello is a sturdy and robust greenhouse, and it comes with all tools needed for assembly. It is available as a 8' x 8' basic model or with added 4' extensions up to 24 feet long. The interior roof peak is 7' 6" high and the side walls are 4' 10" high. Each greenhouse and extension comes with an automatic venting system.

Features & Benefits:

  • Construction: Made from extruded aluminum with 8mm twin wall polycarbonate walls and roof and an integrated base that allows for direct anchoring to the ground or deck. The twin wall polycarbonate has superior insulating capabilities to provide ideal growing conditions in warm or cool weather. This robust design and high-quality aluminum allows the Monticello to withstand substantial snowfalls and high winds.
  • Quick Assembly: It takes about 4-5 hours to assemble the 8' x 8' greenhouse. Twist & Lock nut and bolt fastening construction combined with ribbed design for quick interlocking results in a sturdy structure.
  • Warranty: Made in the USA and comes with a 10-year manufacturer’s warranty.
  • Customize: Design this greenhouse to meet your needs by choosing your own frame, length and adding on optional accessories listed below. Each of the accessories can be custom ordered to fit the length of greenhouse you choose.


  • Work Bench System – the work station is a high-impact PVC vented platform with heavy-duty support bars that hold up to 600 lbs. The work station is designed for either side of the greenhouse and is very easy to install. For the 8 foot unit, the work station is 8’ x 2’ x 30”. The work bench can be ordered to fit each length. There is a 10 year manufacturer’s warranty on the work station.
  • Shade Cloth – the Monticello shade cloth is a simple and thoughtful design to keep your greenhouse cool by reflecting heat and sunlight. It is installed on the inside of the greenhouse, is compatible with the vents and side windows, ships ready-to-use and requires no grommets for installation. Each shade cloth is made from heavy-duty, commercial-grade polyester weave that lets in 37 % light and includes bungee balls for tying.
  • Automatic Watering System – this system is designed to be hung from the ceiling of the greenhouse with 2 weighted sprinkler heads separated by 4’ spray in a circular pattern. The commercial-grade digital timer is designed to allow custom watering cycles depending on plant needs. The hose is designed specifically to prevent mold and bacterial growth and the system is compatible with the shade cloth. It can be installed in any 8’ x 8’ greenhouse. There is a 5 year manufacturer’s warranty on the watering system.
  • Additional Roof Vent – The automatic roof vent is designed for simple and easy installation. It is made from the same high-quality aluminum and polycarbonate as the entire unit and includes the same professional-grade automatic vent opener as is included with the standard greenhouse. There is a 10 year manufacturer's warranty on the vents.

Additional length can be added to the greenhouse by adding 4’ extensions, making it possible to extend the length of your greenhouse over time by ordering extension kits. Each extension kit includes a 2’ x 2’ roof vent with automatic opener and gutters.


10 Year Manufacturer's Warranty

100% Satisfaction Guarantee

We want you to be completely satisfied with every purchase you make. If you are in any way dissatisfied with a product you ordered, we'll exchange it, replace it or refund your money within 30 days of purchase. Simply email us the problem, and we'll take care of you. Certain products have extended warranties (up to 50 years!) that are listed on the particular product page. Please call us at 1-888-451-6752 if you need further clarification.

Additional Information

Weight 225 lbs. (add 66 pounds for each 4' long extension)
Frame Material Extruded, corrosion resistant aluminum (Silver or Black)
Panels 8mm UV-stabilized twin-wall polycarbonate panels
Dimensions 8'x8', 8'x12', 8'x16', 8'x20', 8'x24'
Peak Height 7 feet 6 in.
Sidewall Height 4 feet 10 in.
Assembly TIme 4-5 Hours
Origin Made in the U.S.A.

Shipping Information

Shipping Details:
Insured against damage or loss while in transit
This Product Ships To:
US Lower 48
Ships Via:
Ground Only (No express)

Questions about the Riverstone Monticello Quick Assembly Greenhouse

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  • From Cindy Phillips at 11/30/13 10:36 AM
    • The door details are hard to see in the video and photos. Please tell me about the doors. I see they are double hanger, but do not see tracks where they are secured below or latches to secure them closed. What can you tell me about the door system?
    • The doors for the Riverstone Monticello Quick Assembly Greenhouse are dual low profile “easy roll” sliding entry doors with locking ability. The doors are shipped preassembled.
      The doors are hung from top in a slider track, they are also affixed at bottom to connector plates which slide in the base track. Each door is fitted with a knob.
    • Do you find this question helpful?  Yes  No
  • From Alicia Williamson at 4/7/16 11:01 AM
    • Is a base kit included or available?

      How many roof vents come with the kit, if any (8x12 and 8x16) or are all roof vents extra? If the auto roof vents are extra, can I get more than one?
    • The basic 8 x 8' kit comes with one automatic roof vent. These are good size vents and all you'll need for this size greenhouse. If you want to go larger, the 8 x 12 comes with two auto vents, and the 8 x 16' comes with three auto vents. For each 4' extension, one auto vent is included.

      If you need extra vents, then we can get one for you, just give our office a call and we'll help. 1 888 451 6752.
    • Do you find this question helpful?  Yes  No
  • From Patty at 8/22/16 10:12 AM
    • What is the R or K-value of the 8x12 Monticello? How is base secured to ground?
    • The R# on theProduct Riverstone Monticello Quick Assembly Greenhouse is 7.2.

      It is not secured to the ground. In the instructions video on the left side of the product page it shows details about building the base.
    • Do you find this question helpful?  Yes  No
  • From courtney at 3/28/17 10:26 AM
    • Can you use the green house all year long? or is it just for winter? I live in NY and this will be my first garden
    • This greenhouse will only extend your gardening season, but will not be as effective in the winter as our Solexx greenhouses. Please find our Solexx greenhouses here:
    • Do you find this question helpful?  Yes  No

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Monticello 8x8 in Black Click to Enlarge
Monticello 8x8 in Black 

More Views

  • Monticello 8x8 in Black
  • Shelving close up
  • Automatic roof vent
  • Black Monticello in 8x12 size
  • Quick connect built in gutter system
  • Optional hanging automatic watering system
  • Shelving on work bench
  • work bench bench system
  • Work bench system
  • watering system regulator
  • hanging watering system (24ft shown here)
  • All tools for assembly included!
Product Videos
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