PrimeGreenhouses - Heavy Duty Polycarbonate Greenhouse "The Signature" - Galvanized Steel Frame, 4mm/6mm Twin-Wall Anti-UV
Grow your own food, built to last.
Best for 1-2 people Perfect for a couple - salad greens, herbs, and a few tomato plants year-round.
Secure checkout · Questions? Call or message our team
Discover The Signature, a modern and durable polycarbonate greenhouse with a high-peak roof and a 7.7 ft ridge height, designed to provide a practical, long-lasting growing space with easy everyday maintenance.
One width (7.7 ft) and a 7.7 ft ridge height, available in 7 lengths - extendable later with the 6.6 ft Extension Kit.
| Length × Width | Floor area |
|---|---|
| 6.6 × 7.7 ft | 51 sq. ft. |
| 9.8 × 7.7 ft | 76 sq. ft. |
| 13.1 × 7.7 ft | 101 sq. ft. |
| 16.4 × 7.7 ft | 126 sq. ft. |
| 19.7 × 7.7 ft | 152 sq. ft. |
| 23 × 7.7 ft | 177 sq. ft. |
| 26.2 × 7.7 ft | 202 sq. ft. |
Structure
Polycarbonate Panels
Base & Installation
FREE Damage-Proof Shipping
Every order ships free and fully insured directly to your door anywhere in the continental United States.
Standard Delivery — FREE
Estimated delivery: 4–6 weeks
Delivery dates are estimates and are not guaranteed. They represent the earliest expected delivery window based on current production and freight schedules.
Items are manufactured in batches and shipped from Europe. Production volume, ocean freight, port handling, customs clearance, and other factors may affect delivery times. If your estimated delivery window changes, we’ll notify you by email.
Returns & Refunds
You have 30 days after delivery to request a return, exchange, or refund in accordance with our return policy.
Set up by two people in 2 to 3 days, using common household tools. The complete step-by-step assembly guide is included for a smooth, hassle-free setup.
10-year warranty on the twin-wall polycarbonate panels, covering impact resistance, UV protection, and yellowing.
5-year warranty on the galvanized steel frame against rust and structural defects.
Backed by our 30-day money-back guarantee and free, fully insured shipping across the continental United States.
My absolute happy place. The height is amazing for growing tall tomatoes and companion flowers together. Keeps everything protected while looking stunning in the yard. Couldn't ask for a better greenhouse!
My tomato plants grew like crazy this year. Setup took a weekend, but harvesting a full crate every week made it totally worth it. Best addition to my backyard hands down.
Super roomy and built like a tank. Took a weekend to put together, but the vent windows work great for temperature control on hotter days. Plenty of space to expand our garden this year.
Love the split door design! Being able to open the top half for airflow while keeping the bottom shut prevents my dog from wandering in. My heirloom tomatoes are thriving.
My neighbors can't believe how lush my plants are this early. Assembly was straightforward, and the structure has already held up to some strong spring storms. The inside environment is just perfect.
From my garden to my plate! Best homegrown Caprese salad ever! You can’t buy tomatoes with this kind of flavor in stores. Super sturdy greenhouse too.
Plenty of room for raised beds on both sides and in the middle. The greenhouse kept everything warm through our early spring Ohio frosts, so my crops popped up way faster than expected. Solid build and super functional.
Discover
Living spaces designed to blend elegantly into your everyday life.
No expertise needed. Your greenhouse comes with illustrated step-by-step instructions and only requires common household tools.
Level the ground, place the metal base plate and secure the frame to the foundation.
Click and screw the frame together, place the stakes in the ground, then fill the holes and pack the soil firmly.
Polycarbonate panels slide into the profiles and are held in place by the sealing joints.
Hang the door and install the two roof vents. Your greenhouse is ready to grow.
Thicker panels, heavier steel, and a high-peak roof that sheds wind and snow — here's what that means for your garden, season after season.
Heavy-duty galvanized steel tubing with reinforced Omega profiles delivers 50% more rigidity than the lightweight frames used on standard hobby greenhouses, built to handle wind, snow loads, and years of use.
Twin-wall polycarbonate panels are 70% more impact-resistant than single-wall. UV-coated, insulating, and built to stay clear for years.
The steep high-peak roof deflects wind and sheds snow instead of holding it. Rated for 65 mph gusts and 32 PSF of snow load (about 3 ft of snow), grow through any season.
How It Works
A simple, guided journey, from the first click to the moment you start enjoying it.
Secure checkout in just a few clicks. Have a question? We'll answer it before you even buy.
Your greenhouse is carefully packed and shipped free, anywhere in the US.
Set it up and make the most of it: a true living space you can use all year round, whatever the season.
Tap or hover your state to see the recommended polycarbonate thickness.
General guidance only - always consider your local microclimate, elevation, and exposure. Unsure? Contact our team before ordering.
Cold climate
The double-wall panels trap a layer of air between them, like an insulated mug for your plants. That holds heat in and can cut heating costs by up to 40%, so you can keep greens going well past the first frost and through the coldest months.
Hot climate
Our polycarbonate panels block 99% of UV and diffuse harsh light, so plants get even, gentle sun instead of scorching. The panels stay clear and intact for years, with no fading or brittleness. Two manual windows and an optional auto vent keep temperatures stable when it's 115F outside.
Grow your own food — No pesticides, no grocery runs — just fresh produce, year-round.
Pick your model, set your grocery budget, see your savings instantly.
Pays for itself in -. Pure savings after that.
From Our Customers
Thousands of gardens equipped across the US. Here are a few of them.
Today, we design robust greenhouses built to withstand the toughest conditions and stand the test of time.
Every greenhouse is the result of rigorous work, using high-quality materials that combine strength and beauty, for hobby gardeners and seasoned growers alike.
Read our story →
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Answers to the most common questions before you buy.
No concrete slab required. The frame anchors directly into the ground and the metal base plate ensures stability. A concrete slab or footings remain an option if you prefer, especially in very windy areas.
Not at all. The greenhouse is designed to be set up by two people in 2 to 3 days, using common tools and illustrated step-by-step instructions. Professional installation is also available if preferred.
Yes. The reinforced steel structure and twin-wall polycarbonate panels are built for tough conditions, rated for 65 mph winds and 32 PSF of snow load (about 3 ft of snow). The steep high-peak roof naturally sheds snow and deflects wind.
Yes. Twin-wall polycarbonate is highly impact-resistant, far more durable than single plastic sheeting. It will not crack, and is UV-coated and anti-yellowing to stay clear and strong for years.
Maintenance is minimal. The galvanized steel frame wipes clean with soapy water, and the polycarbonate panels rinse off easily. Rubber seals protect the panel channels from dust buildup.
Your greenhouse ships free and fully insured, with an estimated delivery window of 4 to 6 weeks from your order. Tracking is included and our team is available for any questions about your delivery.
Yes. The greenhouse is modular and can be extended in 6.6 ft sections, up to about 98 ft of total length. Grow your growing space as your needs evolve.
