Fullbloom 20' Greenhouse

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Introducing The Evergreen 20' Wide Greenhouse

Our Evergreen Greenhouse packages make greenhouse growing hassle free and economical by using best in class galvanized steel framing, anti-drip and light diffusing poly, and only the best ventilation and automation options. We designed our framing to be as simple as possible to install, eliminating thousands in potential labor costs from our competitors’ frames. We use the toughest and thickest galvanized steel frames in the industry so your greenhouses last longer and are more resilient in tough weather. All of our accessories, such as our environmental controller and our exhaust fans, are US made and UL listed for easy permitting. Last but not least we provide the lowest cost possible by limiting unnecessary features and streamlining our designs, passing the savings and simplicity on to the customer.

Making the switch from outdoor (or indoor) growing to greenhouses makes more sense than any other growing style. By limiting exposure to rain, snow, humidity, pests, excessive heat and cold, the quality of the flowers produced are often comparable to any indoor garden. Outdoor growers can save thousands in expenses every month by harnessing the power of the sun. Indoor growers save tens of thousands on building and energy costs by harnessing the sun and lower equipment costs. Use the Evergreen's automated controller and thermometer to control your internal temperature and ventilation systems automatically, making the entire process easier than ever.

Standard Quonset Style:

The Quonset style greenhouse is only available in sizes 20 feet wide and 20-95 feet long. It has a center height of 12 feet. Our sidewalls are straight, rather than competitors’ hoop houses, which allow you to maximize the amount of plants in your grow space without sacrificing plant height. Both endwalls are covered with the clear plastic. One wall contains the custom, pre-welded double doors (4’ x 8’ each) and the other is a solid endwall. The permanence of the endwalls makes it easy to mount fans and other equipment. Each kit includes:

  • Pre-cut, pre-drilled galvanized steel framing.

  • Anti-drip poly for superior humidity control.

  • Highest sidewalls in class (7ft) for maximum airflow and plant space.

  • Manual side roll-up setup for improved ventilation.

Optional equipment includes automation controllers, exhaust fans, HAF (horizontal airflow) fans and intake louvers for internal air circulation. For those growers interested in fully automation, inquire about the environmental controller, which works with all your air circulation, heating, and cooling equipment to simplify your grow operation.

Anti-Drip Poly:

We made our anti-drip poly the standard option on our greenhouses, rather than relying on potentially inferior options. Our poly’s anti-drip technology reduces harmful condensation all year round, protecting your plants from excess surface moisture. This poly also assists with humidity, reducing any costs associated with dehumidifying your grow. The light diffusing qualities of the anti-drip poly result in an astounding increase in plant yield, by as much as 30%. We are happy to offer this to you in order to further increase your growth and eliminate some potential problems.  

Manual Roll-up Sides:

Open your greenhouse to the summer breeze on a clear day. Easily reach the exact plant you want to treat. With the included manual roll-up cranks simply adjust both sides of the greenhouse’s clear plastic to generate greater ventilation.

  • Easy-to-use wind up tool.

  • Smoothly roll plastic up to desired height.

  • Clear plastic is secured to the galvanized steel roller bar, eliminating flyaway edges.

  • Includes 2 steel roller bars, 2 winding mechanisms and mounting bolts.

Recommended setup time is between 2-7 days with a 2-person crew. Depending on the size of structure, more time or labor assistance may be required.

For extreme conditions or added peace of mind, additional supports are available with our Standard or Extreme Support Trussing Kits.

Shipping price is for a single greenhouse with no accessories shipped on the west coast. For other locations and more accurate shipping quotes, please contact your sales representative. 

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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