Riverstone 12 ft. x 18 ft. Thoreau Premium Educational Greenhouse-R12186-P - The Home Depot


Model # R12186-P

Internet # 204378489

12 ft. x 18 ft. Thoreau Premium Educational Greenhouse

Riverstone 12 ft. x 18 ft. Thoreau Premium Educational Greenhouse

This item has been discontinued.
The Home Depot no longer carries this specific product.

$11,999.00 / each


Model # R12186-P

Internet # 204378489

The Thoreau Educational Greenhouse Package is designed for schools with horticulture programs, correctional institutions and serious gardeners for both growing and therapeutic reasons. The 2 in. x 2 in. galvanized steel frame with pre-welded stanchions and Commercial graded 8 mm twin wall corrugated covering (walls and roof) are the same specifications used in commercial products in the market today. The walls and roof are warranted for 10 years and have a 15-20 year life expectancy. The Thoreau Greenhouse is named after the great naturalist and agriculturalist Henry David Thoreau. The walls of the Thoreau are 6 ft. tall with a center peak of 9.5 ft. for optimal air circulation. The design of Educational greenhouses requires attention to details that are different from that of hobby or commercial greenhouses. The design differences include the ability to accommodate large numbers of people (students) and allow them to become a part of the growing process, secure environment that can be locked when not in use, built to last construction that will provide many years of use, all within a climate controlled environment that is thermostatically controlled. Our factory is a leader in providing functional, affordable greenhouses to schools and universities. Our educational line of greenhouses has been refined over the years and our offering is the most comprehensive in the market today. All our products are proudly made in the USA.

  • Includes all the accessories that a school, institution or serious gardener would need
  • 8 mm twin wall polycarbonate end walls, side walls and roof
  • 2 in. x 2 in. galvanized base rail and framing system
  • 42 in. wide x 7 ft. tall 3/4 in. French door glass entry security steel door with lockset
  • 2 - 24 in. motorized shutters for air circulation
  • 1 - 18 in. quietaire industrial exhaust fan
  • 2 - 3 ft. deep x 18 ft. long commercial work benches
  • 1 -two stage commercial thermostat to control fan and shutters
  • 1 - 240 volt electric heater with built in thermostat
  • 1- 18 ft. x 20 ft. (63%) shade cloth with tie down rope
  • 1 - automatic and programmable watering system with timer
  • Professional grade greenhouse and needs to be assembled by a professional, this product is not available for return once purchased

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Approximate Greenhouse Depth (ft.)  18  Approximate Greenhouse Height (ft.)  10 
Approximate Greenhouse Width (ft.)  12  Assembled Depth (in.)  216 in 
Assembled Height (in.)  114 in  Assembled Width (in.)  144 in 
Door Opening Height (In.)  84  Door Opening Width (In.)  42 
Product Depth (in.)  216  Product Height (in.)  114 
Product Width (in.)  144 
Assembly Required  Yes  Floor Options  No 
Floor Options  Without Floor  Foundation Included  No 
Frame finish family  Light  Lockable Door/Gate Latch  Yes 
Number of Doors  Number of Vent Openings 
Product Weight (lb.)  1607.000 lb  Returnable  90-Day 
Shelving Included  Yes  Storage Capacity (cu. ft.)  171 
Warranty / Certifications
Manufacturer Warranty  10 year limited 



Curbside Truck Shipping (By Appointment) includes delivery to receiving area/dock for businesses or curbside for residential orders. The carrier will contact you to make a delivery appointment with a 4 hour window once the items have arrived at the local hub in your area. Delivery appointments are required.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.