Riga XL

Riga XL Greenhouse

The Hoklartherm Riga XL greenhouse is the flagship of the Riga line, offering maximum space, strength, and insulation for serious year-round gardeners. Designed and engineered in Germany, it combines advanced performance with lasting durability to support dependable year-round growth.

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Overview

The Riga XL greenhouse is built to endure challenging climates with confidence. Its reinforced aluminum frame and curved side walls provide superior resistance to snow, wind, and hail. The thick 16 mm polycarbonate glazing delivers outstanding insulation and light diffusion, maintaining an interior environment that supports healthy plant growth. The polycarbonate fits tightly inside the engineered framing. Every detail reflects Hoklartherm’s commitment to quality and precision.

As the largest model in the Riga series, the XL offers taller and wider interior space for plants and projects alike. It creates a warm, protective environment that helps gardeners extend the growing season and achieve consistent results, even in harsh conditions. The Hoklartherm Riga XL combines capacity, craftsmanship, and performance in a structure designed to last for generations.

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Key Features

German Engineering

Designed and manufactured in Germany

16 mm Triple-Wall Polycarbonate

16 mm panels on side walls and gable ends

Sturdy 13-Gauge Aluminum Frame

Provides sturdy structural support

Curved Sidewalls

Helps snow slide off

Multiple Roof Vents

Improves ventilation

Automatic Roof Vent Openers

Included for temperature control

Two Split Barn-style Locking Doors

38” wide, ADA compliant

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Specifications

Glazing: 16mm twiple-wall polycarbonate (side walls and gable ends)
Frame: 13 gauge aluminum extrusions
Colors: n/a

RIGA XL 5

Suggested Retail: $17,250
Length: 16'5" (5 panels)
Width: 14'
Peak Height: 9'10"
Area: 231 sq. ft.
Doors: 2 Barn Style Hinged Door w/Locks
Door Size: 37.5" W x 74" H
Windows: 4 Roof Vents
Window Openers: 4 Automatic (Roof)
Window Size: 37.5" W x 39.5" H

RIGA XL 6

Suggested Retail: $18,499
Length: 19'10" (6 panels)
Width: 14'
Peak Height: 9'10"
Area: 280 sq. ft.
Doors: 2 Barn Style Hinged Door w/Locks
Door Size: 37.5" W x 74" H
Windows: 4 Roof Vents
Window Openers: 4 Automatic (Roof)
Window Size: 37.5" W x 39.5" H

RIGA XL 7

Suggested Retail: $20,749
Length: 23' (7 panels)
Width: 14'
Peak Height: 9'10"
Area: 322 sq. ft.
Doors: 2 Barn Style Hinged Door w/Locks
Door Size: 37.5" W x 74" H
Windows: 6 Roof Vents
Window Openers: 6 Automatic (Roof)
Window Size: 37.5" W x 39.5" H

RIGA XL 8

Suggested Retail: $21,999
Length: 26'3" (8 panels)
Width: 14'
Peak Height: 9'10"
Area: 368 sq. ft.
Doors: 2 Barn Style Hinged Door w/Locks
Door Size: 37.5" W x 74" H
Windows: 6 Roof Vents
Window Openers: 6 Automatic (Roof)
Window Size: 37.5" W x 39.5" H

RIGA XL 9

Suggested Retail: $22,999
Length: 29'6" (8 panels)
Width: 14'
Peak Height: 9'10"
Area: 413 sq. ft.
Doors: 2 Barn Style Hinged Door w/Locks
Door Size: 37.5" W x 74" H
Windows: 8 Roof Vents
Window Openers: 8 Automatic (Roof)
Window Size: 37.5" W x 39.5" H

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Testimonials

"My wife and I wanted to learn to grow vegetables as part of a healthy and active lifestyle. We purchased a Riga greenhouse, assembled it ourselves and raised it on the south side of our home. With no former experience, we started to grow a variety of greens, cucumbers, tomatoes, beets, broccoli, herbs and flowers. Now in our third year, we grow year round in the greenhouse. It is very well constructed and with a small blower heater, we can maintain growing temperatures in winter in North Carolina. It is wonderful to go out to the greenhouse every morning and clip a bucket of fresh green for an amazing breakfast! It has literally been life changing."

- Anonymous
"A Nice Functional and Sturdy Greenhouse. It is now a year + later and I am still very pleased with this structure. It is very functional much more energy efficient than my previous one and has even survived a hurricane. Definately not a single man job and probably would have been much easier with three persons but two ole guys were quite successful."

- Wayne
"Great greenhouse, great service! I asked a million questions to Andrew. I really researched this product. They answered all my questions and installed the Riga XL. I couldn't be happier with both the service and product. It's very rare you get this quality experience. The help I got in setting up the foundation to the greenhouse setup was amazing. Our greenhouse is even better than we imagined. We even purchased additional heaters and composting bins!"
- Reid Ro
"Tropical greenhouse. Upstate NY has long hard winters, but this Christmas (2016) it hit 96 degrees in my greenhouse and the tropical plants are loving it. The shape seems to shed the snow really well and it has enough height for most plants. I used 1/2 inch pipe insulation over the aluminum arches to minimize the condensation, I keep the humidity high for the plants. A gas furnace keeps it warm (65 degrees F) and a 1 KW grow light helps with the dark snowy days. If we're not out there I leave a portable heater's pilot light on to keep the carbon dioxide levels from dropping too low, there is only about 1 air exchange per hour (it seals well) and the plants need a little more carbon dioxide of optimal growth. The optional aluminum foundation worked well, and the floor is decorative stones in a plastic grid material that makes the stones very stable to walk on.

The kits directions were good but don't under estimate the other work like leveling the site and bringing in gas, water, and electric. Exaco was very good about taking care of some minor parts issues with this complex kit. It is now a tropical paradise with bananas, papayas, plumeria, coffee, tea, avocado, cinnamon, orange, lime, guava, figs, Hawaiian tree fern and lots of orchids. We're very happy with it and everyone says it looks good."

- John R.
"Outstanding product. The purchase of our Riga was one of the best buying decisions my wife and I have ever made. It is a top quality and value product. My wife wants to divorce me and marry the Riga. The service and support we received from the folks at Exaco was in a word "Outstanding". We purchased our Riga XL in 2011. To avoid potential issues be sure to follow assembly instructions carefully."

- Tim Jim