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6 Best Greenhouse Kits for 2023 to Maximize Your Garden Space

6 Best Greenhouse Kits for 2023 to Maximize Your Garden Space

Want to keep gardening even when the weather turns cold? A greenhouse kit enables you to grow plants and vegetables beyond the normal outdoor growing season. However, with so many greenhouse kits on the market, it can be tricky to decide which one is right for you. 

So, to make your search easier, here is an overview of the 6 best greenhouse kits for 2023:

  • Hoklartherm Riga Greenhouses 5 - Best Overall
  • Little Cottage Company Colonial Gable Greenhouse - Most Elegant
  • Exaco Janssens Junior Victorian Greenhouse - Best Glass
  • Outdoor Living Today Cedar Greenhouse | 8×8 - Best Wooden
  • Outdoor Living Today Garden in a Box 6×3 with Lid - Best Budget
  • VEIKOU Walk-in Polycarbonate Greenhouse | 6' x 8' - Best Polycarbonate

From sturdy walk-in greenhouses to elegant Victorian-style models, this list covers various styles and sizes to meet any gardener's needs. Read the details below to discover which greenhouse kit can help you cultivate thriving plants regardless of the season!

1. Hoklartherm Riga Greenhouses 5 (165 sq.ft.) - Best Overall

an actual image of the Hoklartherm Riga Greenhouses 5 (165 sq.ft.)

Made in Germany with precision engineering, the Riga 5 Greenhouse is constructed from durable 8mm twin-wall polycarbonate sidewalls and 10mm polycarbonate gable ends. This thick glazing provides superior insulation, keeping plants protected from cold weather and extreme temperatures. Four roof windows with automatic openers allow for excellent ventilation and temperature control. A large rear wall window also provides additional airflow when needed.

Key Features:

  • 165 sq. ft. of growing area
  • 8mm twin-wall polycarbonate sidewalls
  • 10mm twin-wall polycarbonate gable ends
  • 4 roof windows with auto openers
  • Rear wall window for ventilation
  • The locking door provides security


  • Provides excellent insulation and UV protection
  • Automatic roof windows enhance ventilation
  • Spacious growing area for a variety of plants
  • High-quality polycarbonate glazing made in Germany
  • The door lock provides security for your greenhouse


  • Door hinges may need reinforcing
  • Requires solid foundation



Final Verdict:

For gardeners seeking a high-quality greenhouse with superior durability, the Hoklartherm Riga 5 is an excellent investment. With ample growing space and thick polycarbonate glazing that provides insulation, UV protection, and temperature control, this greenhouse excels at creating an ideal growing environment for plants. The pros easily outweigh the few minor cons, making this a great choice for the serious gardener.

2. Little Cottage Company Colonial Gable Greenhouse - Most Elegant

Pristine white Colonial Gable Greenhouse by Little Cottage Company nestled in a lush garden.

The Little Cottage Company Colonial Gable Greenhouse is the epitome of elegant design and superior craftsmanship. This exclusive greenhouse is constructed by Amish craftsmen known for their impeccable attention to detail. The pre-assembled panelized kit comes primed and ready for paint, allowing for quick and easy installation. With its abundance of windows, polycarbonate roofing, and thoughtful design features, this greenhouse creates the perfect gardening oasis.

Key Features:

  • Elegant colonial gable design with Dutch door and louvers
  • Constructed with high-quality LP Smartside siding and trim
  • Includes 18"x22" safety glass windows with tempered glass, grids, and screens
  • Corrugated polycarbonate roofing provides durability and light transmission
  • Available in a range of sizes to suit your gardening needs
  • Ships as a pre-assembled panelized kit for easy installation
  • All hardware and screws included for assembly


  • Timeless colonial design that enhances visual appeal
  • Maximum natural light penetration through ample windows
  • Thoughtful ventilation features for ideal growing conditions
  • Durable, rot-resistant siding built to withstand elements
  • The pre-assembled kit allows for a quick and easy setup


  • Insufficient roofing nails provided
  • Common carrier equipment unable to handle unloading



Final Verdict:

The Little Cottage Company Colonial Gable Greenhouse is the ultimate choice for gardeners seeking a greenhouse that combines visual elegance and high functionality. While assembly requires some effort, the prefabbed panelized kit simplifies the process. The abundance of windows bathes plants in natural light while ventilation features create the perfect growing environment. Constructed from durable materials built to last, it is one of the best greenhouse kits for year-round gardening. Its timeless beauty and impeccable craftsmanship make the Colonial Gable Greenhouse a worthwhile investment for avid gardeners.

3. Exaco Janssens Junior Victorian Greenhouse - Best Glass

an actual product image of the Exaco Janssens Junior Victorian Greenhouse standing in a garden

The Exaco Janssens Junior Victorian Greenhouse is an elegant and functional greenhouse that provides a premium growing environment in a compact footprint. With its classic Victorian styling and high-quality European craftsmanship, this greenhouse adds beauty and practicality to any backyard.

The Junior Victorian combines 4mm tempered safety glass, sturdy aluminum framing, and excellent insulation to create an ideal microclimate for plants. The glass panels are sealed with substantial rubber seals rather than just metal clips, enhancing insulation. Additionally, the glass is a single pane without overlaps, further minimizing heat loss.

Key Features:

  • Classic Victorian design with improved structural integrity from squared hollow tube aluminum framing
  • 4mm tempered safety glass
  • Thick, heavy-duty aluminum profiles
  • Single-pane glass panels without overlaps
  • Glass sealed with rubber seals
  • 4" high foundation frame
  • Gutters and downspouts included
  • Sliding door for easy access
  • TÜV and GS certified for safety

The 5-foot high side walls allow ample headroom inside the greenhouse, while the peaked roof reaches 8'2" at its highest point. Two size options are available: the 23S model provides 79 sq ft of growing space, while the larger 24S model has 97 sq ft of interior area.


  • Durable tempered glass and thick aluminum construction
  • Excellent insulation properties retain interior heat
  • Spacious 5' high side walls
  • Available in two sizes to fit backyard needs
  • Gutters and downspouts included for water management
  • The sliding door provides easy access


  • Assembly instructions could be clearer with more detailed diagrams
  • Some parts like bolt heads are tricky to install
  • Not designed for colder climates without additional heating



Final Verdict:

For those seeking a premium backyard greenhouse with timeless style, the Exaco Janssens Junior Victorian is an excellent option. The high-quality European craftsmanship ensures this greenhouse will last for years while creating an ideal growing environment inside. While some assembly challenges exist, the end result is a stunning and highly functional greenhouse perfect for small backyards. The 4mm tempered glass, robust aluminum construction, and spacious growing area make this a top choice for growers wanting both beauty and performance.

4. Outdoor Living Today Cedar Greenhouse | 8×8 - Best Wooden

outside view of Cedar Greenhouse | 8×8

The Outdoor Living Today Cedar Greenhouse is an excellent option as a hobby greenhouse. Made from durable western red cedar, this 8x8 greenhouse provides over 400 cubic feet of growing space.

The cedar construction is not only beautiful but also strong, durable, and rot-resistant. The greenhouse features 6mm thick polycarbonate roof and wall panels that provide insulation and light filtration. An automatic roof window opener helps regulate temperature.

Key Features:

  • 8 x 8 footprint with 104" height
  • 410 cu. ft. capacity
  • Western red cedar construction
  • 6mm polycarbonate panels
  • Automatic roof window opener
  • 14+ ft. of shelving
  • Complete hardware included


  • Spacious growing area
  • Durable and attractive cedar build
  • Insulated panels regulate the temperature
  • Lots of built-in shelving
  • Easy to assemble with detailed instructions


  • Can take a long time to stain prior to assembly
  • May require extra clamps for assembly



Final Verdict:

With its quality cedar construction, ample growing space, and temperature regulation features, the Outdoor Living Today Cedar Greenhouse is an excellent choice for extending the gardening season. The spacious design accommodates many plants and the cedar build ensures it will last for years. Just be prepared for a time investment in assembly and extra staining/sealing. Overall, this high-quality greenhouse is a great way to keep gardening through colder months.

5. VEIKOU Walk-in Polycarbonate Greenhouse | 6' x 8' - Best Polycarbonate

Aluminum Greenhouse Kit for Outdoor, Walk-in Polycarbonate Garden Greenhouse for Plants in Winter with Heavy Duty Metal Frame

The VEIKOU Walk-in Polycarbonate Greenhouse is the best polycarbonate greenhouse kit for protecting plants and extending the growing season.

This greenhouse features upgraded 6mm thick polycarbonate panels that provide insulation to keep the interior warm. The panels also protect plants from frost and cold temperatures. The heavy-duty aluminum frame is powder-coated for durability against outdoor elements.

Key Features:

  • 6mm thick polycarbonate panels
  • Powder-coated aluminum frame
  • Lockable door with handles
  • Adjustable ventilation with 4 positions
  • Grey color blends into outdoor patios


  • Thick polycarbonate panels insulate the interior
  • The durable aluminum frame stands up to weather
  • Adjustable vents provide airflow
  • Spacious 6' x 8' size fits lots of plants


  • Challenging and time-consuming to assemble
  • May require some panel trimming for proper fit



Final Verdict:

The VEIKOU Walk-in Polycarbonate Greenhouse is the best polycarbonate kit if you want a durable and spacious greenhouse to keep plants thriving outside of the normal growing season. The thicker polycarbonate panels and sturdy aluminum frame make this an ideal choice for protecting plants from cold weather.

6. Outdoor Living Today Garden in a Box 6×3 with Lid - Best Budget

Garden in a Box 6×3 with Lid / Trellis front view

The Outdoor Living Today Garden in a Box 6x3 with Lid is a great budget-friendly option for anyone looking to start a backyard garden. This cedar-raised garden bed offers ample growing space while taking up a small footprint.

The Garden in a Box stands 33.5 inches tall and comes fully assembled with fold-down front fence panels for easy access. The sturdy 1 1/8 inch thick cedar boards ensure durability while the black wire mesh backing keeps pests out. When closed, the hinged lid doubles as a 71-inch trellis, perfect for supporting climbing plants as they grow.

Key Features:

  • Assembled dimensions: 72W x 39D x 33.5H inches
  • Cedar construction
  • Pre-assembled panels for quick setup
  • Fold-down front fence for easy access
  • 20-inch high growing beds
  • 33.5 inch fencing with black wire mesh backing
  • The hinged lid converts to a 71-inch trellis
  • Marine grade hinges won't rust
  • Cedar arm for easy opening and closing
  • Hardware included


  • Spacious 6x3 foot growing area
  • Trellis lid supports climbing plants
  • The fence keeps dogs and pests out
  • Easy access to fold-down front panels
  • Durable cedar construction
  • Rust-proof marine-grade hinges


  • Requires a lot of soil to fill
  • Reaching plants in the back can be difficult



Final Verdict:

For those with limited space, the Outdoor Living Today 6x3 Garden in a Box is an excellent choice. The tall fences keep critters out while allowing you to grow crops vertically with the built-in trellis. Despite a few minor complaints about reaching the back plants, the pros of a spacious growing area and pest protection seem to outweigh any cons. For gardeners needing an all-in-one raised bed and trellis, this budget-friendly cedar option is definitely worth considering.

a side by side photo of a glass greenhouse and a polycarbonate greenhouse

Things to Consider When Looking for the Best Greenhouse Kits

When looking for the best greenhouse for your needs, there are several key factors to keep in mind:


Consider the dimensions of the greenhouse and the amount of growing space needed. Measure your available yard space and opt for a greenhouse that fits without overwhelming the area. Lean-to greenhouses attach to walls and take up less space. 


Common greenhouse coverings include glass, plastic, and polycarbonate. Glass offers elegance but is heavy and prone to breaking. Plastic is affordable but less durable. Polycarbonate is lightweight, insulating, and impact-resistant.


Proper airflow and ventilation prevent overheating. Look for roof vents, side vents, and exhaust fans to regulate temperature. Roll-up sidewalls also allow ventilation.


Galvanized steel frames resist corrosion for durability. Wooden frames made of cedar or redwood are attractive but require more maintenance. Aluminum is rust-resistant but can be prone to bending.


Add-ons like shelves, sinks, grow lights, and heaters customize the greenhouse for your needs. Benches and storage maximize space.


Pre-assembled kits are easier to set up than DIY kits. Assess your construction skills and time commitment for building a greenhouse from scratch.


Opt for a sturdy greenhouse built of quality materials that can withstand snow, wind, and temperature fluctuations in your climate.


Greenhouse prices range widely depending on features, size, materials, and accessories. Determine how much you’re willing to spend to narrow choices.

By carefully evaluating these key considerations, you’ll be able to select the ideal greenhouse kit to meet your gardening needs and expectations. Determining the right size, features, and quality construction is essential for long-lasting performance. With some thoughtful planning, you’ll soon be growing thriving plants in your dream greenhouse!

an actual image of the Exaco Janssens Royal Victorian VI Greenhouse VI 23 surrounded by plants


Investing in a greenhouse kit allows you to create a protected, stable environment for nurturing plants. Focus on finding a durable, quality kit that fits your space and budget when deciding. The greenhouses featured here provide excellent choices across different needs, dimensions, and pricing. With the right setup, you'll be harvesting fresh veggies and enjoying beautiful flowers even during the coldest months. Give your gardening a boost with one of these top-rated kits.


As a gardener, why might I need a walk-in greenhouse?

A walk-in greenhouse is perfect for those who are serious about their gardening. It provides a dedicated space for your plants and gardening tools, protects your plants from harsh weather conditions, and extends your growing season. They can range in size from small, mini greenhouses to larger, commercial greenhouses.

Are there greenhouses specially designed for gardens with limited space?

Yes, a lean-to greenhouse or a smaller greenhouse is perfect for gardens with limited space. These greenhouses are typically attached to a wall or fence and provide enough space for seedlings or smaller plants. Miniature greenhouse kits are also available for small spaces.

What type of greenhouse is best to keep my plants warm in winter?

A quality greenhouse with good insulation can help keep your plants warm in winter. Greenhouses that are made from polycarbonate or have a double-wall design are great for insulation. You may also want to consider purchasing greenhouse heaters to maintain the right temperature in the cold months.

How do I use a DIY greenhouse?

A DIY greenhouse allows you to assemble your own structure, giving you greater control over its design. Greenhouse kits of 2023 come with instructions and all the necessary parts you need. You'll need to ensure the greenhouse fits your available space, and you may require additional tools depending on the kit.

Are there greenhouses that can be attached to my home?

Yes, lean-to greenhouses are designed to attach to an existing structure like your home or a shed. This makes it easy to access, saves space in your garden, and can utilize heat from the attached building to help keep your plants warm.

What is a commercial greenhouse?

A commercial greenhouse is a large greenhouse kit that provides plenty of room for numerous plants and is suitable for undertaking commercial propagation of plants. They are often used by professional gardeners and nursery owners, but can also suit serious hobbyists who want plenty of space for their plants and gardening tools.

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About The Author

Andy Wu - Resident Expert

Andy Wu - Resident Expert

Andy Wu is the resident backyard products expert and hails from Atlanta, Georgia. His passion for crafting outdoor retreats began in 2003.

As a fellow homeowner, he founded Backyard Oasis to provide top-quality furnishings and equipment, collaborating with leading manufacturers.

His main focus is on sheds and generators!

In his spare time he like to hike the tallest mountains in the world and travel with his family.

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