Product Description

Indulge in Unmatched Year-Round Gardening with the Hoklartherm RIGA Greenhouse

Looking for a top-quality greenhouse that'll make your gardening dreams come true? The Riga Greenhouse 4S might just be your perfect match. Imagine stepping into your own personal garden oasis, filled with lush greenery and vibrant blooms, right in your backyard.

Its clever design is like a cozy blanket for your plants, keeping them warm in winter and cool in summer. So no matter what the weather's doing outside, your plants will be living their best life. Whether you're a gardening whiz or just starting out, you'll be surprised by how much you can grow with this greenhouse. From fresh veggies in the dead of winter to starting your own seeds for a spring garden, the Riga Greenhouse 4S opens up a whole new world of gardening fun.

Riga Greenhouses with a person outside with a fresh produce of vegetables.

Allow for the Cultivation of a Wider Variety of Plant Species

  • Year-Round Gardening Paradise: Perfect for growing fresh vegetables, herbs, and flowers in every season.
  • Exceptional Insulation: 8mm twin-wall polycarbonate side panels and 10mm twin-wall gable panels keep the interior warm in winter and cool in summer.
  • Balanced Ventilation: Designed with one roof vent (automatic opener included) and one rear window to maintain healthy airflow for your plants.
  • Expert Craftsmanship: Built with heavy-duty 13-gauge aluminum extrusions and German-engineered quality for long-lasting durability.
  • Optional Customization: Add shelving accessories to expand your growing space and keep your greenhouse organized.
  • Easy Foundation: Securely anchor your greenhouse without pouring concrete, thanks to the optional 6" foundation frame.
  • Elegant Addition: A sleek, modern design that enhances the beauty of any garden setting.
  • Lifetime Investment: Built to last, this high-quality greenhouse ensures years of reliable gardening enjoyment.

Don't let the weather dictate your gardening plans. Get ready to experience the joy of gardening all year round. Order your Riga Greenhouse 4S today and start growing your dreams!

Hoklartherm Greenhouses 4S in the woods

Why Choose RIGA?

German Engineering Designed and manufactured in Germany by Hoklartherm, ensuring top-quality craftsmanship and durability.
Strong & Durable Frame Built with heavy-duty 13-gauge aluminum and interlocking profiles that resist loosening under wind or snow load.
Superior Insulation 8mm twin-wall polycarbonate side panels and 10mm gable panels provide excellent insulation for year-round growing.
Reliable Ventilation Equipped with one roof vent (automatic opener included) and a rear window to maintain healthy airflow.
Hoklartherm Greenhouses inside view

Optional Foundation Frame A 6" high foundation frame can be buried to anchor securely without the need for concrete.
Customizable Shelving Optional shelving systems and accessories available to maximize space and fit diverse gardening needs.
Elegant & Functional Design Sleek greenhouse structure adds beauty to any garden while offering practical growing benefits.
Long-Term Investment Built to last, the Riga offers reliable performance and years of gardening enjoyment.
Hoklartherm Riga Greenhouses 4 opened door

Specifications of Riga 4S Greenhouse

Dimensions (W x L x H) 7'8" x 14' x 7'1"
Square Footage 108 sq. ft
Doors 1 Barn Style Hinged Door w/Lock
Door Size 30" W x 72" H
Windows 1 Roof Vent, 1 Rear Window
Window Openers 1 Automatic (Roof)
Window Size 3'5" x 2'1"
Frame 13 gauge aluminum extrusions
Glazing 8mm twin-wall polycarbonate (side walls) / 10mm twin wall polycarbonate (gable ends)
Riga Greenhouse with man on top


Finish Setting Up Your Greenhouse with This Bundle Package

Enhance your RIGA Greenhouse 4S experience with this discounted bundle package, complete with top and bottom shelves for organized gardening and a sturdy foundation frame for added security. It's everything you need to maximize your growing potential and create a thriving greenhouse environment.

Exaco RIGA Top Shelf and bottom shelf product image

Top Shelf & Bottom Shelf

A top shelf, measuring a convenient 10" wide, provides a dedicated space for your smaller plants and seedlings to flourish. Meanwhile, a wider bottom shelf, at 25", offers plenty of room for your gardening tools, pots, and supplies. Shelf length and pricing will depend on the specific greenhouse size you choose.

Exaco RIGA Foundation Frame base

RIGA Foundation Frame

With the foundation frame, your greenhouse will remain stable and have a level base, regardless of any unevenness in the ground.


Optimize Your System and Environment with These Optional Add-Ons

Exaco Exhaust Fan in white background for Riga s Greenhouses

Exhaust Vent with Fan

Attach this 110-volt cable for convenient temperature adjustment.

Solar exhaust fan from Exaco for Riga s Greenhouses

Exaco Solar Exhaust Fan System

This product has a 50-watt solar panel, 16" CE-approved fan, thermostat, and 20-foot cord.

Automated aluminum louver Exaco Modern greenhouse vent for temperature and humidity control.

Intake Shutter Vent

This vent is designed to provide precise control over temperature and humidity in the greenhouse.

Exaco RIGA Portable Milkhouse Heater product image

Uline Milkhouse Heater

Keep your plants safe year-round with this lightweight, powerful, and portable greenhouse heater. Features 4,437–5,120 BTU heat, 1,300–1,500W use, rugged metal housing, and auto shut-off for safety.

Close-up of Exaco INKBIRD ITC-608T thermostat with dual probes.

Inkbird Thermostat

Inkbird ITC-608T thermostat with dual probes controls 2 heating/cooling devices separately. Plug-and-play, 120V/15A/1800W, range -40°F–212°F.



Let the Sunshine In: Upgrade Your Greenhouse with Door & Window Kits

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Drop Door Kit - Hinged Doors & Sliding Doors

Tailored greenhouse riser made for RIGA 2s, 3s, or 4s. Install on a stem wall to raise your greenhouse by 20 inches, improving air circulation and enhancing plant growth conditions.

Exaco RIGA Automatic Window Opener used

Automatic Window Opener

Created for RIGA models 2s, 3s, 3, 4s, 4, and 5. The opener has a fast-release arm for simple disconnection in bad weather, keeping your investment safe. (Replacement pistons are available for purchase separately).

Exaco Royal Victorian Spindle Roof Window Opener Manual

Spindle Roof Window Opener

The basic opener works similar to a screw, letting you change the window for better air circulation. The stainless steel coating makes it strong and stylish. (Please note that you need a long handle to use it, which is sold separately.)

Stainless steel T-bolts and nuts securing a roof window restraint cable in a RIGA aluminum greenhouse.

Roof Window Restraints

Keep your greenhouse's automatic roof openers safe from powerful winds by using this kit. It comes with two 15-inch stainless steel cables, along with nuts and bolts for each window.

Black plastic sash lock securing the door of an aluminum greenhouse.

Sash Lock

Created for roof windows and upper door halves, this useful device helps you close and lock these openings in severe winter conditions or storms, keeping your plants safe and healthy.


Secure Support for Bountiful Harvests With These Accessories

Exaco Misting System product image

Misting / Watering System

This misting system is 14 feet long and is made for a 20-foot greenhouse. It has 5 misting heads that can be adjusted for more water or a cooling mist. Plus, it can be easily cut to fit your greenhouse size

Stainless Steel Plant Hooks for Exaco Greenhouses

Stainless Steel Plant Hooks

This 5-hook set is perfect for your greenhouse. Hang plants or accessories with ease using the T-bolt head that smoothly slides into frame channels. You can also adjust the height for added convenience.

 A pile of stainless steel T-bolts and nuts for greenhouse assembly.

T-Bolts

Easily fasten shelves and accessories in your greenhouse with 20 stainless steel bolts and nuts. Insert the 6mm bolts into the channels, turn to secure 15mm for RIGA models.

Stainless Steel Plant Hooks for Exaco Greenhouses

Hooks for Growing

Improve your greenhouse by adding our channel inserts and hooks. They can be easily set up to support wire or rope for climbing plants. Each pack contains 10 plastic inserts and hooks, as well as a small stainless steel S-hook.

Exaco Greenhouse Wheelbarrow Ramp for convenient greenhouse access.

Wheelbarrow Ramp

This durable rubber ramp, 49cm wide, 31cm long, and 10cm high, makes it simple to move things in and out of your greenhouse.

Exaco Astrica Grow Light LED fixture designed for greenhouse use, providing full-spectrum lighting in a slim, energy-efficient housing.

Astrica Grow Light

Select either corded or cordless options and link up to 15 units for spacious growing spaces. This 4-foot LED grow light bar has the F3 spectrum and 12 waterproof LEDs, promoting strong plant growth. It has a sturdy build and a 5-year warranty.

A solar-powered LED light mounted on a white wall.

Solar Powered Light

Eco-friendly solar LED light for greenhouses/sheds. 250 lumens, 4 hrs runtime, cool white 6000K. Easy install, weather-resistant, 2-yr warranty. Not a grow light. 


Introduction to the RIGA 's' Greenhouse

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