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Hoklartherm Riga XL 8 Greenhouse 14x26

Your Price:
$14,400.00 $14,500.00

Foundation Frame
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Pro Accessory Kit
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Door Extention Kit
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Hoklartherm Riga XL 8 Greenhouse 14x26

Your Price:
$14,400.00 $14,500.00

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For a Limited Time take a $100 off a RIGA greenhouse. Use code 100RIGA at checkout.

Hoklartherm Riga XL 8 Greenhouse 14 x 26 x 9

The RIGA XL 8  is truly a greenhouse by the European definition of a greenhouse - designed to be used to grow fresh vegetables, herbs and flowers in the middle of winter. While other so called “greenhouses” using less than 8 mm twin-wall poly-carbonate, are considered to be Season Extenders, to be used when only a slight night frost might be expected during the spring or fall season. At best they can only be used to house established plants during the winter season. The RIGA Greenhouse offers the minimum insulation needed to grow plant year-round – others using less insulation cost too much to heat.

As the Germans like to call it the "Onion" shaped, this structure withstands strong winds.  Riga is the best structure for cold weather especially during snows. Snow will slide right off . The frame is really strong which explains why our customers always brag about keeping these greenhouses for a long time!

One major advantage of the Riga's construction method is that the frame profiles are permanently attached to each other, and won't come loose over time due to wind pressures.

The 16mm triple-wall poly-carbonate glazing on the RIGA XL Greenhouse is German-made and believed to be of superior quality than the much more common Polygal or GE glazing.

The Riga Greenhouse is by far the strongest greenhouse under $13,000.

In addition, great airflow is provided as you open the Dutch barn style door. As the temperature of the greenhouse changes, the over-sized rear window will open and close automatically depending on the inside temperature. 


    •  ✔  Extremely heavy duty construction, great for windy areas or for snow season. Similar class to Volkswagen/Volvo, very dependable.
    •  ✔  Frame made of Aluminum
    • ✔   16 mm triple wall poly-carbonate
    •  ✔  Comes with DVD and written Assembly Instructions

Technical Information: 

✔   Two Large Heavy duty Dutch Barn Door with keyed lock - 37.5 in wide x 74 in tall.

✔   Large Rear Wall window: 30" wide x 72" high with adjustment arm

✔   First-class insulation: R or K-value 3.0

✔   6 Roof Window(s): 40" w x 39.5" d; with Automatic Window Opener

✔   Floor Space: 368 sq. ft. (14' ft wide x 26'3" ft long)

✔   Size: 14' w x 26'3 x 9'10"

✔   Assembly time: 2 to 3 people, 2 full days 

✔   Warranty: Poly-carbonate: 10 years; Frame: 15 years

NB: We recommend you buy one size bigger than you planned.

The RIGA Greenhouse is designed, engineered, and manufactured in Germany by Hoklartherm, a leading manufacturer of commercial and hobby greenhouses, and other structures, with over 28 years experience. 

Riga XL 8 Greenhouse Pro Accessory Kit

This collection of optional accessories is the perfect way to upgrade any RIGA XL greenhouse model. All of these accessories have been picked to be beneficial to plant growth and health.

The pro kit is your complete starter kit designed to make your gardening experience as easy and fun as possible. The Pro kit includes the following: 

✔  3 sets of Professional LED grow lights (46 " L)

✔  One 24" Intake Shutter vent

✔ One 20" exhaust fan

✔  Thermostat to control vent & fan

✔  17,500 BTU 220 V Heater

✔  5 heavy duty seed trays

✔  10 stainless steel hooks & heavy duty plastic "hooks"


The RIGA assembly FACILITATION KIT contains tools that will make the assemblyfacilitation kit process go smoothly and correctly. It includes the following: 

✔  25' metric tape measure

✔  10 mm socket wrench

✔  10 mm open wrench

✔  Two 20' J-hook ratchet straps

✔  Window restraint cables

✔  Two tubes Boss 399 silicone caulk

✔  Permanent marker

Additional Options are available:

Foundation Frame: 6" high Foundation frame is buried in a trench when greenhouse is not anchored to concrete

Door Extension kit: To raise greenhouse 20” when placed on stem wall.

Fast & Free Shipping

Mulberry Greenhouses will handle your shipping from the minute you place the order until you receive it, we are committed to sending you order as fast we can.


✔ We offer free Standard Shipping in the Continental USA (sorry we don't ship outside of this area).


Please check our complete shipping and return policy at the bottom menu.