Best Steel Greenhouse Cold Frames in 2026

ALL SEASON: The portable greenhouse is designed to protect your plants and seeding against rough weather conditions like rain, wind, and snow. It can create the best environment for your plants to grow healthily and is helpful to extend your growing season.

GOOD GARDENING PARTNER: It benefits the plants SO MUCH with the indirect light and keeps the moisture and heat from the day in all evening. Growth makes it a breeze! NOT ONLY protects delicate plants in winter BUT ALSO is used to propagate seedlings and cuttings. Great addition to your garden.

ECO-FRIENDLY PE COVER: PE green cover is odorless, non-toxic, low-temperature resistance, acid, alkali corrosion resistance, aging resistance. lets in a lot of heat but doesn't burn the seedlings as the clear covers have done.

Keep Ideal Heat and Humidity: The 2 Windows and Roll-Up Zipper Door provide good ventilation for the portable walkin greenhouse, to create desirable heat and humidity for plants to grow healthily and extend the growing season!

Large Space: Outdoor greenhouse on both sides with 3 tiers 8 shelves, each shelf 12" wide holds more plant pots, 17" high between each tier to provide ample space for plant growth. The middle 32"x56"x77" space is big enough for you to place more tall plants or move around for work.

Sturdy & Durable: Green houses for outside winter structured with sturdy rust-resistant steel pipes. The 16 clip-shelf fixers prevent the shelf from moving. Anchors and ropes help stabilize the portable greenhouse and prevent being blown down by strong winds.

Secure Hold - PVC Greenhouse Clamps provide a strong hold on the film without punctures or adhesives. Easily secure your greenhouse plastic sheeting, shade cloth, construction film, or any other type of material without tearing or damaging your product. The dimensions of this product are (4" Long x 3/4" Wide).

4" Long x 3/4" Wide - Works on 3/4" PVC pipe, or 1.00" O.D. post. Our clamps for pvc pipe are engineered to have a higher temperature resistance, making them more durable in the sun and heat.

Uses - Great for building cold frames, greenhouses, shelters, or row covers. Compatible with any type of pipe, including PVC. Strong grip with ABS, will not degrade your plastic sheeting or film over time.

🔸DURABLE CONSTRUCTIONS: The construction of this small greenhouse is durability and rust-resistant, suitable for indoor or outdoor use. STEEL FRAME & CCOLD PROOF PVC cover (0.12mm) of the greenhouse kit provide maximum protection.Supports 23.4lb weight capacity per tier.

🔸EASY ASSEMBLY & STOREAGE:You can easily assemble with no tools required.Storage is a breeze too:The indoor outdoor greenhouse can be easily folded up and be put it in basement when you've finished using it. It only occupies a small area.

🔸PERFECT FOR HOMES OR BACKYARDS - You can place the portable greenhouse on a balcony, deck, patio, or encased porch.Green house for plants outdoor&indoor blends into the gardening surrounding

ITEM EXACTLY MATCH THE DESCRIPTION---- Heavy-duty powder coated steel framework + UV protected, Waterproof, Reinforced, Transparent PVC cover (with ropes let cover and frame combined better).

GOOD SIZED PORTABLE MINI GREENHOUSE---- 71"WX 36"D X 36"H, Big enough to work for good sized plant pot & seed bed. Can be used both indoors & outdoors.

OVERLONG COVER DESIGN---- Makes greenhouse more airtighted and secure, just bury it in the soil, easy way but useful.

Multiple Shelves, Large Interior: Crafted with 4 wire shelves and overall dimensions of 57 x 29 x 77 inches, Our green house is large enough for starting seedlings, sprouting young plants, planting flowers and cultivating fresh vegetables. 3 tiers and different heights between each shelf allow you to grow both small and large plants side by side

Roll-up Entrances & Windows: Zippered roll-up front entrance provides easy access and a bigger work space. 2 side windows offer better air circulation inside the green house, so even in hot weather, your plants can breathe fresh air.Custom mesh windows effectively stop plants from being harmed

High-quality, Reusable, Long-life PE Cover: Our VIVOSUN green house cover has double-stranded edge banding, making it tough and durable.In addition, it can prevent harm from rays and bad weather while still bringing good solar conditions to nourish your plants

[Suitable Size] More details in picture,frame greenhouse not include.Before buying, please measure the size of your shelf

[PE Material] Heavy duty reinforced polyethylene cover,not need to worry about the greenhouse will deformed.

[Waterproof and Anti-UV] The product is 100% waterproof and anti-UV to enable your plant and flowers to absorb more sunshine provide enough room for theirs growth.

【TYPE- L】Large diameter hoops, suitable for 3.5' or wider bed. Please choose the correct material type for your bed to avoid breaking or becoming too weak.

【DIY KIT】Comes with 25 large diameter hoops, 17" in length, 20 connectors, 16 clips. You can combine with 4 or more hoops to DIY your own grow tunnel. And you can use the clips to fix the greenhouse covering.

【JUST BEND IT】Connect a certain number of rods with the connector according to your needs. Bend the hoops and magic happens, the hoops can be tightly connected. Insert it into the soil and the parts can be used season after season.

🌱【ROLL-UP DOORS】The 3 zippered side doors of the small greenhouse allow easy access for tending to your plants and controlling temperature and humidity

🌱【LONGER TUNNEL GREEN HOUSE】Long tunneled greenhouse provides plenty of room for plants growing, while it features a small and lightweight body that portable to carry to anyplace you want it in

🌱【HEAVY-DUTY STEEL FRAME】This long outdoor greenhouse is made of a powder-coated tubular steel frame in sturdy construction, the surface is spray-treated to prevent rust, corrosion, and delay

Strong and Stable: The frame uses heavy duty materials which can bear up to 30 pounds. The greenhouse is rust-resistant and strong enough to hold plants, pots, and lights.

Visualization PE Cover: You can observe your plants directly through this premium transparent PE cover.

Unique Design: The portable mini greenhouse a zippered roll-up door for easy access and screened ventilation for optimum air circulation, so your plants and seedlings will grow and thrive all seasons long.

Suitable Size: More details in picture,frame greenhouse not include.

PE Material: Heavy duty reinforced polyethylene cover,not need to worry about the greenhouse will deformed.

Waterproof&Anti-UV: The product is 100% waterproof and anti-UV to enable your plant and flowers to absorb more sunshine provide enough room for theirs growth.

Ideal size: see the picture for more details, not including the frame greenhouse.Note: please confirm the size before purchasing.

User-Friendly Design: the design of rolling shutter and Zipper door,easy to operate, with shielding ventilation, can achieve the best air circulation.

Waterproof and Anti-UV: the product is 100% waterproof and Anti-UV, allowing your plants and flowers to absorb more sunlight and provide enough space for their growth.

Dual Opposite Door Design: The Eagle Peak outdoor tomato hot-house greenhouse is designed with two doors on opposite sides, great for tomatoes, eggplants, fruits and other plants.

Quality Material: This cold frame grow house is made of heavy-duty powder coated steel tubes and 140 gsm reinforced PE cover. The frame is rust-resistant and built for long-lasting use.

Built-in Eyelets: The tomato greenhouse features 8 metal eyelets: 4 eyelets on top and 2 eyelets on both sides for tomato stakes. The eyelets will help position the support rods vertically and horizontally to support tomato plants.

Suitable Size:More details in picture,frame greenhouse not include(this was just a cover)

Roll-Up Zipper Door Design: Designed with roll-up zipper door for easy access and screened ventilation for optimum air circulation

Transparent Design: Clear PVC allows your plants get enough sunlight, which is conducive to the growth of plants and vegetables; Also transparent cover provides a better visibility, you can observe them from outside without taking them off

✿ EFFECTIVE PLANT PROTECTION-This product is designed to protect our carefully cultivated plants outdoors from frost, wind, birds, insects and other animals. It also supports a series of cultivation and research of plants in the laboratory and laboratory, including temperature control, humidity control, artificial pollination and so on. This will be a good space.

✿ RIGHT SIZE-The size of the greenhouse is 180x90x90cm/71’’L x 35.4’’W x 35.4’’H, weighting 5.02kg, which is about 11.07 pounds and folds down to a travel size of 36.2"L x 5.51"W x 11.42"H.

✿ HUMANIZED DESIGN-Double zipper design can disperse the force, so that the process of opening is smoother. The separation of the frame and the outer cover and the plastic connectors make it easy to assemble and disassemble and carry, which is more convenient for storage and greatly saves space. The B3 mesh on both sides of the top arc can give ventilation and ventilation to the shed effectively. Through transparent PVC, the growth of beloved plants can be observed more directly.

Protect Your Plants - A small greenhouse can prevent cold weather damage and preserve warmth and sunlight for plants; Planting season all year around, and suitable for maintaining plants or seed breeding

Easy to Assemble – No tools required for assembling this green house as it is fast and easy to build with its simple yet effective design

Easy Access – Easily lift the lightweight green house from the plants it is covering to tend to them

【More Plants To Place Than Ever】 2 newly-added shelves behind and 12 side shelves of this greenhouse can contain more stuff than normal ones. Upgraded steel wire shelves, high hardness connectors and powder-coated steel poles make higher load-bearing capacity possible (MAX 46 lbs/shelf).

【Upgraded Cover Material】 Reinforced 4.7 mil (was 3.5 mil) PVC clear cover which is added 6% Anti-UV inhibitor, makes longer greenhouse service life possible. No worries - all safe eco-friendly materials are selected to make your plants all good.

【Zipper Mesh Door and Screen Windows】 The roll-up door and 3 mesh windows help to control the temperature and humidity when weather changes. The walk-in greenhouse can maintain higher temperatures when fully closed, and cool down by rolling up all windows and door.

EASY TO SET UP -- Stretch the collapsible pop up cover and run the 2 folding fiberglass poles through the top and a pop up greenhouse presents to you. Much convenience to fold it up and store when not using in summer.

ECO-FRIENDLY MATERIALS – Access to the SGS test report recognition. Fine processing of 600D oxford combined with 18mil clear PVC cover, Waterproof UV protection. 1.5mmx6mm steel-wire rods and 8.5mm fiberglass poles, with high-end quality and unique design, good performance and longer life to use.

6 STAKES PROVIDED -- Help to strengthen the tent. Special design of cloth buckles around the tent so that you can use extra ropes and stakes easily in bad weather.

⭐Newly Upgraded POP-UP Greenhouse: Are you looking for a new garden tent that is reliable, sturdy, light to assemble and easy to store? You can assemble a high-end, durable Greenhouse in 3-5 minutes and a few simple steps, with roll-up windows and doors for added ventilation, thickened PE mesh and top-grade steel wire support structure to withstand harsh weather conditions and extend your plant growing season.

⭐Smart Design: While most collapsible greenhouses on the market have multi-piece frames, we use a brand new integrated design: when you open the package, the product automatically pops open, eliminating the need for a tedious assembly process and making the storage process easier by simply folding and bending to fit in the package. We believe that after you use our upgraded and convenient greenhouse, you will leave behind the old greenhouse that was so cumbersome to install and store.

⭐Rock-solid Stability: Our portable greenhouse tent is equipped with a high-grade durable steel wire frame construction, thickened anti-aging PE fabric, eight metal pegs and four pull cords included for added stability to withstand strong winds and help support the structure. The construction of this greenhouse is rigid and durable enough to endure most outdoor conditions with no problems.

◖✿◗ Good Sized Greenhouse:98"x49"x53" , big enough to work for good sized plant pot & seed bed. Can be used both indoors & outdoors. Very portable, Ideal to manage your backyard gardening.

◖✿◗ Easy to Set up: Tunnel style transparent cover, durable frame allows easy mobility to change the location, DIY Gardening design allows you to move these greenhouses from location to location easily.

◖✿◗TRANSPARENT PLASTIC COVER: The tough, durable and transparent PE plastic cover protects plants while allowing nourishing sunlight to pass through.

Metal Structural Bars: The VIVOSUN Green House is incredibly robust and firmly supported by powder-coated heavy steel frames

Tough Material: PE cover with a crosshatch of green reinforcing fibers throughout. The PE gird cover can protect from harmful rays and bad weather, and give you good solar performance

Lightweight and Space Saving: Comes with 4 deep shelves for seedling starting trays or pots, saving space on your balcony and giving you the convenience to start seedlings indoors before moving them outdoors

TWO PANEL TYPES PROVIDE ULTIMATE BALANCED GROWING CONDITIONS - Virtually unbreakable twin-wall polycarbonate roof panels protect from strong sunlight exposure while crystal-clear polycarbonate wall panels provide over 90% light transmission.

STURDY THOUGHTFUL CONSTRUCTION WILL LAST A LIFETIME - Panels block harmful UV rays to protect plants from sun overexposure. The sturdy, oxidation resistant powder coated aluminum frame includes a galvanized steel base to add structural stability.

STEP-BY-STEP DIY INSTRUCTIONS DESIGNED FOR HOMEOWNER INSTALLATION - Easy installation accomplished with sliding panels' assembly system. Galvanized steel base includes designated pre-drilled holes for anchoring (anchors not supplied) for additional stability. Single hinged door can be assembled as either right or left hand door to gardener's preferences.

Mini greenhouse cover: This small greenhouse measures 51" W x 36.25" D x 37.5" H and weighs 6 lbs. It features two 26" L x 32" W doors and fits perfectly over planters and garden beds (not included).

Made from quality materials: This patio greenhouse features a sturdy steel tube frame and PVC panels to help protect your plants from the elements.

2 side doors: This greenhouse cover has 2 convenient zippered side doors to easily access your plants.

Suitable Size: More details in picture,frame greenhouse not include.

PVC Material: Heavy duty reinforced polyethylene cover,not need to worry about the greenhouse will deformed.

Waterproof&Anti-UV: The product is 100% waterproof and anti-UV to enable your plant and flowers to absorb more sunshine provide enough room for theirs growth.

COMPACT, RAISED GREENHOUSE: Portable, round raised bed greenhouse features a translucent, waterproof cover that fully closes to protect and grow plants

PROTECTS PLANTS: Triple layer, heat bonded ripstop translucent cover is 5. 5 oz thick, waterproof, and UV-treated inside and out and designed specifically for plant growth and protection

REDUCES HARMFUL RAYS: Translucent fabric allows a significant amount of diffused light to reach the plants, while reducing the amount of harmful UV light

ONE PERSON SETUP: This green house can be set up easily by one person. The portable frame can be easily opened and folded without tools for easy use. Easier than ever to transport and store due to our pre-assembled frames.

ZIPPER DOOR & ROLL-UP WINDOW: The roll-up zipper door can be fully opened for easy access. The rolled-up mesh window provides fresh air and drains moisture while keeping birds out. Velcro on the windows keeps the greenhouse fully closed in bad weather.

STABLE AND STURDY: The steel frame, which makes the structure of this greenhouse solid and durable, package includes 6 sandbags, 4 guylines and 4 metal mounting stakes, provide extra stability in windy conditions.

【Water Drainage Groove Design】Roof grooves are designed to prevent rainwater from accumulating on the roof and can be used outdoors in rainy days.

【Absorb Enough Shine】Equipped with transparent polycarbonate glazing boards, this wooden garden cold frame greenhouse ensures that your plants will absorb the maximum light to achieve the best plant photosynthesis.

【Adds a Touch of Green】Elegant and simple design gives our patios, balconies, decks and gardens a touch of green.

GREENHOUSE PACKAGING DIMENSIONS: Each greenhouse open size measures L28X W28X H32 Inch . It can be easily folded, A 15 inch Round handbag is included for easy storage and carriage ,weight is 4 lbs

PACK OF 2 GREENHOUSE SPECIFICATION: Mini greenhouse features a pop up design. It is quick to use, with no assembly required. The greenhouse folds easily. Each greenhouse 8 ground stakes (Total 16 pcs) can be used to fasten and stabilize the greenhouse. Each packaging has 2pcs greenhouse

HIGH QUALITY MATERIAL: TETINY POP mini greenhouse is made of high clear 12 silk PVC which is durable and waterproof. And frame use 4mm fibreglass rod, it won't break when you folded, it protects plants or flowers from wind, rain, frost, insects. Provide a warm and humid space for plants to grow

【Foldable Top】The top part of cold frame could be open and close, and two bolts on the two sides which could be used to fix the top.

【Absorb Enough Shine】Equipped with transparent polycarbonate glazing boards, this wooden garden cold frame greenhouse ensures that your plants will absorb the maximum light to achieve the best plant photosynthesis.

【Adds a Touch of Green】Elegant and simple design gives our patios, balconies, decks and gardens a touch of green.

2 roll-up screened vents for temperature regulation

Get your garden started earlier

Easy to use patented pop-open system