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Hoklartherm Riga 3s Greenhouse 8×11

$5,700.90$7,350.90

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Hoklartherm Riga 3s Greenhouse 7'8"x10'6"
Hoklartherm Riga 3s Greenhouse 8x11 $5,700.90$7,350.90

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    Solar-Powered Greenhouse Exhaust Kit

    $764.10

    Solar-Powered Greenhouse Exhaust Kit The Exhaust-Power Solar-Powered Greenhouse Exhaust Kit by Exaco will allow you the flexibility to keep your greenhouse cool and comfortable using solar power. The 50 watt foldable solar panel can be used flat or folded. It comes with included supports for various placement options.. This unique feature will allow for multiple […]

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Hoklartherm Riga 3s Greenhouse 8×11

Hoklartherm Logo

Are you looking for a greenhouse that can withstand heavy winters and has ample door space to move tools and plants in and out? The Riga 3s Greenhouse is a great option for the serious gardener with limited space.

The unique “onion shape” provides ample interior space while also making the most of available square footage. The Riga 3s Greenhouse comes with heavy-duty seals and a combination of 8mm UV-coated Polycarbonate glazing on the sides and 10mm in the front and back to insulate and keep this greenhouse comfortable in all seasons. The Riga uses a thicker material that insulates better than a glass window in your house.

The Dutch barn style door provides an opening wide enough to move a wheelbarrow, plants, and tools through. It can also be opened at the top to provide airflow. For extra ventilation, the Riga 3s is equipped with 1x large roof window that opens and closes automatically according to the temperature inside the greenhouse. There is also 1x rear window for cross-ventilation.

The Riga 3s is constructed in Germany with a smooth finished anodized aluminum. These materials are built to last in harsh winters with high winds. This greenhouse is outstanding on its own and can be further customized with a stem wall or accessories. With a substantial warranty of 10 years for the panels and 15 years for the frame, you are guaranteed many years of greenhouse gardening with the Riga 3s.

Features & Benefits of Riga 3s Greenhouse

  • Sturdy “onion”-shaped construction that withstands strong winds and snow
  • Sidewall material/thickness: 8mm UV-coated twin-wall Polycarbonate
  • Gable material/thickness: 10mm UV-coated twin-wall Polycarbonate
  • Frame material: Smooth finished anodized aluminum
  • First-class insulation:
    • Heavy-duty rubber seals and silicon caulking to seal windows
    • High-quality construction with tightly fitted parts
    • R-value 2.0
  • Door: 1x wide, heavy-duty Dutch barn style door (30in wide x 72in high), handle with key lock
  • Roof vents: 1x roof window (40in wide x 24in long) with an automatic opener which works without electricity
  • 1x large rear wall window (30in wide x 42in long) that allows for cross ventilation
  • Included in the Riga 3s Greenhouse Kit:
    • Profiles, glazing, rubber seals, and hardware
    • 1x roof vent with automatic opener
    • 1x barn-style door
    • 1x rear wall window
    • Assembly instructions(also available here)
  • Optional accessories:
    • 6” high foundation frame: If you add this, you don’t need a concrete or wooden footer. This foundation frame will attach to the bottom of the greenhouse frame and goes into a trench in order to anchor the whole greenhouse.
    • Premium kit: See details below
    • Door extension kit: Set your greenhouse on a 20-inch stem wall. This kit gives you the missing pieces of Polycarbonate (+ profiles) that go above the doors. It includes 2x extensions for both doors.
  • Rainwater gutter system: No (not possible because of the greenhouse shape)
  • Stem wall: Supported by manufacturer (up to 20in; need to order a Door Extension Kit)
  • Expandable: No
  • Frame color: Aluminum/silver
  • Side wall height (curve): 6ft 1in high near shelves
  • Peak height (interior): 6ft 11in
  • Floor Space: 81 sq. ft.
  • Dimensions: 7ft 8in wide x 10ft 6 in long x 7ft 1in high
  • Assembly time: Min of 3 people – approx. 1-2 days, with 4 people – approx. 6-8 hours
  • Warranty:
    • Twin-wall Polycarbonate: 10 years (prorated after 5 years)
    • Frame: 15 years
  • Made in Germany
  • Shipping information: Greenhouse ships in 3 boxes, premium kit ships in 4 boxes. This product is delivered via LTL which is curbside delivery only. The driver will be using a pallet jack and liftgate to slide the crate off and will need help from the customer with the unloading of the framing cartons. We recommend having a couple of people there for the delivery.

The RIGA is attractive and beautiful to look at – fits well into an upscale garden setting.

With a combination of strong materials and durable hardware, the Riga is by far the strongest greenhouse of its size under $5,000.

Made in Germany with 30 years of experience!

The Polycarbonate glazing on the Riga is German made and believed to be of superior quality than the much more common Polygal or GE glazing.

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. For a better anchoring in the floor, you can add the heavy-duty foundation frame.

Riga 3s Greenhouse Premium Kit

If you want to use shelves and a base frame, the Riga 3s Greenhouse Kit will be the best choice.

Includes the following items:

  • Riga 3s Greenhouse
  • Foundation frame
  • 10in deep top shelf (attached to greenhouse side)
  • 25in deep regular shelf

Riga 3s Greenhouse Door Extension Kit

If you want to raise your door because you set your Riga 3s on a stem wall, you can buy a door extension kit. It will raise the height by 20 inches.

If you need more shelves or another combination of accessories, please, don’t hesitate and call or send us an email at [email protected].

Features & Benefits

  • Sturdy “onion”-shaped construction that withstands strong winds and snow
  • Sidewall material/thickness: 8mm UV-coated twin-wall Polycarbonate
  • Gable material/thickness: 10mm UV-coated twin-wall Polycarbonate
  • Frame material: Smooth finished anodized aluminum
  • First-class insulation:
    • Heavy-duty rubber seals and silicon caulking to seal windows
    • High-quality construction with tightly fitted parts
    • R-value: 2.0
  • Door: 1x wide, heavy-duty Dutch barn style door (30in wide x 72in high), handle with key lock
  • Roof vents: 1x roof window (40in wide x 24in long) with an automatic opener which works without electricity
  • 1x large rear wall window (30in wide x 42in long) that allows for cross ventilation
  • Included in the Riga 3s Greenhouse Kit:
    • Profiles, glazing, rubber seals, and hardware
    • 1x roof vent with automatic opener
    • 1x barn-style door
    • 1x rear wall window
    • Assembly instructions (also available here)
  • Optional accessories:
    • 6” high foundation frame: If you add this, you don’t need a concrete or wooden footer. This foundation frame will attach to the bottom of the greenhouse frame and goes into a trench in order to anchor the whole greenhouse.
    • Premium kit: See details below
    • Door extension kit: Set your greenhouse on a 20-inch stem wall. This kit gives you the missing pieces of Polycarbonate (+ profiles) that go above the doors. It includes 2x extensions for both doors.
  • Rainwater gutter system: No (not possible because of the greenhouse shape)
  • Stem wall: Supported by manufacturer (up to 20in; need to order a Door Extension Kit)
  • Expandable: No
  • Frame color: Aluminum/silver
  • Side wall height (curve): 6ft 1in high near shelves
  • Peak height (interior): 6ft 11in
  • Floor Space: 81 sq. ft.
  • Dimensions: 7ft 8in wide x 10ft 6 in long x 7ft 1in high
  • Assembly time: Min of 3 people – approx. 1-2 days, with 4 people – approx. 6-8 hours
  • Warranty:
    • Twin-wall Polycarbonate: 10 years (prorated after 5 years)
    • Frame: 15 years
  • Made in Germany
  • Shipping information: Greenhouse ships in 3 boxes, premium kit ships in 4 boxes. This product is delivered via LTL which is curbside delivery only. The driver will be using a pallet jack and liftgate to slide the crate off and will need help from the customer with the unloading of the framing cartons. We recommend having a couple of people there for the delivery.

FAQs

Assembly & preparation

Does the Riga come with a base/foundation frame?

No. You can either purchase the foundation frame separately or purchase the premium kit that also includes shelves for just a little higher price.

What foundation/ground/footing do you recommend?

There are plenty of options for you to prepare the ground before setting up the greenhouse. If you choose to purchase the foundation frame, you don’t need a foundation. You only need to level the ground and add material of your choice. We usually recommend gravel, dirt, or pea rock. The foundation frame will go into a trench to provide more stability. For more details and more foundation options, please read the Riga XL Reference Manual (page 30ff, measurements are for Riga XL VI).

Do you recommend a cement foundation?

Cement foundations hold a lot of heat in the summer and a lot of cold in the winter. Therefore, we do not recommend a concrete slab.
You can, however, build a concrete footing (like a stem wall that is flush with the ground) and fill the inside with gravel, dirt, or pea rock.
You can also add the foundation frame as an additional accessory. This will work without a concrete foundation or footer.

How long does the greenhouse take to assemble?

Assembly time depends upon the number of people assisting, how many shelves are added, if a foundation frame is added, and on personal assembly skills. The assembly time takes from 6 hours to a day (or more) depending on these factors and does not include ground preparation time.

Where do I find the assembly instruction?

Assembly manuals can be found here: Riga Manuals. You can also check out the assembly videos.

Can the Riga be assembled in the winter, as in can the panels handle being “bent” during assembly when they are cold?

Yes, but everything will be stiff. It is recommended to keep the panels inside (warm) and only bring them out when needed during the assembly process.

Accessories

How does the automatic window opener work without electricity?

A special cylinder filled with paraffin oil expands and contracts in response to temperature changes. This pushes the window open when it gets hot inside and closes the window when it cools down. The temperature range is adjustable.

Can I install an electric fan?

Yes, simply cut the required hole with a utility knife in the polycarbonate glazing either in the back or front walls. No fan is included with Riga greenhouses but it can be added additionally.

What is the weight capacity for the Riga shelving (9″ and 15″)?

The shelf strength depends on the frame. If the frame that the shelving is attached to is too weak, the frame will bow outwards. In the Riga, 150lbs is about the maximum weight capacity.

Is a shade cloth required?

This is dependent on what you plan to grow. If you are planning to use the greenhouse to grow and house exotic plants during daytime temperatures in excess of 85-90º F, virtually any greenhouse will need some kind of shade cloth and or misting system in order to keep temperatures down.

Do Riga Greenhouses need a heat source for the winter?

The more plants you have, the more heat they will produce. So, it depends on how many plants you are planning to grow. In addition, it depends on what type of plants you want to grow, i.e. kale grows in cool temperatures, whereas tomatoes need more warmth. There might be times that the temperature may drop significantly for longer periods. Although the Riga provides great insulation, you have to decide whether you need a heater or not according to your own needs.

What heaters do you recommend?

This highly depends on the size of the greenhouse and how you want to use your greenhouse in winter. We offer some heaters here, but you may just check out a local hardware shop that provides more options. If you want to learn more about greenhouse heaters, read this guide first.

Structural questions

What is the snow rating of the Riga L and XL series?

The roof of the Riga greenhouses has no “shoulder” or ridge for snow to accumulate. Snow and debris simply slide down the roof. The Riga L & XL can withstand 30 PSL ground-snow load. In the event of continuous heavy snowfall, remove snow from the base of the greenhouse, creating a trench. This will allow new snow to slide off easily and not block sunlight from the sides and roof of the greenhouse.

What is the wind resistance rating?

Due to its unique roof slope, strong winds are diverted over the roof of the Riga greenhouses. Additional wind resistance is provided through the 4 lateral support bars, which span from the front to the back of the greenhouse. The Riga L & XL is adequate to support 120 mph of wind (three-second gusts).

Can the units be enlarged later if I need to expand the greenhouse?

No, they cannot. The roof beam and base profiles are one piece and cannot be extended.

Do the Riga greenhouses require maintenance?

No routine maintenance is required. It is recommended to check annually that all nuts, bolts, and screws are still tight.

Which side of the Riga Polycarbonate panels has UV coating?

The UV coating is applied directly to the Polycarbonate and is invisible. The side with the UV coating has a plastic covering applied. The covering is a WHITE or CLEAR film that has writing on it. The writing will say “UV Protected”, “UV Coated”, “UV” or a symbol of the sun.

The kit should be assembled with the UV-coated panel facing toward the sun. If the writing is on both sides of the panel, both sides have been treated with UV coating. If the Polycarbonate film is BLUE or has the word “Plexotec” written on it, both sides have a UV coating.

Shipping

Where does this ship from?

Austin, Texas

Do you deliver to the house?

This product is delivered via LTL which is curbside delivery only. You will need to work with the driver to unload the contents of the crate, leaving the crate on the truck. The exception would be if you have a forklift or tractor with long forks available, which can be used with the liftgate to lower the entire crate to the ground. We recommend having a couple of people there for the delivery.

How long does it typically take for the shipment to arrive?

It usually takes about 2 weeks for your order to arrive. This unit ships from Texas. It takes 1-2 business days to package and then it ships to the shipping facility located nearest to you. The shipper then makes contact to schedule a delivery.

Due to the high demand during this pandemic, we are running low on products, and shipping companies take longer than usual. Please, keep this in mind when ordering. We will send you a follow-up email if there is a longer waiting time for your order.