MONT Greenhouse
Price range: $3,149.99 through $7,199.99
Features
- USA-made value build: thicker, stronger aluminum framing made in the USA
- High-impact 8mm panels: UV-stable twin-wall polycarbonate for everyday durability and season extension
- Expandable later: add 4' extension sections as your needs grow
- Simple setup (no concrete required): integrated base installs on a level surface
- Wide hinged double doors: easy access with a secure, closed-up feel
- Automatic roof venting: helps dump heat on sunny days without constant babysitting
- Starter-friendly upgrades available: turn it into a “Premium” with the accessory package
What's Included
- Frame + glazing + hardware + tools
- Roof vents with auto openers (qty varies by size)
- Lockable hinged double door
- Optional Premium Package includes: Workbench, watering system, sink, and interior shade cloth
Dimensions
Available in 5 sizes:
- 8' x 8': 8’5” W x 8’5” L x 7’6” H
- 8' x 12': 8’5” W x 12′5¾" L x 7’6” H
- 8' x 16': 8’5” W x 16′6¼" L x 7’6” H
- 8' x 20': 8’5” W x 20′7″ L x 7’6” H
- 8' x 24': 8’5” W x 24′7¾" L x 7’6” H
Shipping
- Fast & smooth shipping:: Trouble-free delivery via FedEx Ground
- Lead time: 3–5 business days.
Assembly & Warranty
- Average assembly time: Allow for a FULL weekend to fully assemble (ground prep NOT included). A minimum of 2 people for assembly, but 3-4 is recommended. The actual time to construct will depend on the size of the greenhouse and skill levels.
- Assembly Manuals:
- 8' x 8': Download here
- 8' x 12': Download here
- 8' x 16': Download here
- 8' x 20': Download here
- 8' x 24': Download here
- Warranty: 10 years on polycarbonate (prorated after 5 years), 15 years on frame
Secure Checkout
Nationwide Delivery
Veteran-Owned
Real Greenhouse Owners
Personalized Planning Help
Description
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The MONT Greenhouse is a robust, practical greenhouse built for real gardening life. Made in the USA with stronger aluminum framing and 8mm twin-wall polycarbonate, it’s designed to extend your season, protect your plants, and stay enjoyable to use year after year.
It’s a great fit if you want a dependable greenhouse that covers the essentials—plus the flexibility to expand later as your garden grows.
A quick note on the name: MONT greenhouses were previously known as Monticello. The name was updated, but it’s the same greenhouse line (and in some cases improved). So if you’re searching for a “Monticello greenhouse,” you’re in the right place.
USA-Made Frame You Can Trust
MONT uses thicker extruded aluminum framing that’s made in the USA and built for long-term outdoor use.
It’s a straightforward, well-built structure that holds up to real gardening life—opening and closing doors daily, venting, seasonal shifts, and years of sun exposure.
8mm Polycarbonate That’s Built for Real Gardens
The 8mm twin-wall polycarbonate panels are a great match for gardeners who want durability and insulation without worrying about fragile glazing. They help smooth temperature swings and handle the bumps and knocks that happen in everyday use.
This is a greenhouse you can use hard—seed starting, shoulder-season growing, and daily in-and-out—without babying it.
Expandable Design (Start Now, Grow Later)
One of MONT’s biggest advantages is that it’s expandable. If you’re not ready to commit to a huge footprint today, you can start with a smaller size and add 4′ extension sections later—without replacing the whole greenhouse.
It’s a practical way to avoid the classic regret of “I wish I went bigger,” while keeping the upfront investment manageable.
Everyday Venting + Secure Close-Up
A greenhouse only works if you can manage heat easily—and still close everything down with confidence when weather turns. MONT pairs simple, effective venting with upgraded locking hardware so you can ventilate on good days and secure the greenhouse quickly on stormy ones.
More Secure Double Door
The hinged double doors now use a more substantial locking system with a bar-style mechanism you can engage and disengage easily. It gives the entrance a tighter, more secure close—especially helpful on windy days and for day-to-day peace of mind.
Lockable Roof Vents
On very stormy days, you can lock the roof vents down for extra security. Many greenhouse lines treat this as an add-on upgrade—MONT includes it as part of the updated design so you can button things up fast when weather gets rough.
Simple Setup Without Pouring Concrete
MONT is designed for a more approachable install. The integrated base lets you set the greenhouse on a properly leveled surface without requiring a full concrete slab.
That makes it a strong choice for people who want a real greenhouse—but also want flexibility in how they prep the site.
(Photo: integrated base / anchor points / level surface install)
Make It a “Premium” (Starter Kit Upgrade)
Want to turn your greenhouse into a more complete growing setup from day one? MONT’s optional premium accessories are designed to make the space easier to use and more comfortable right away—especially if you’re seed starting or using the greenhouse daily.
Premium package includes:
Full-length foldable workbench
Programmable watering system
Sink system
Interior shade cloth
Gallery
Quick Size Guide
Peak height: 7’5″
Sidewall height: 4’8″
Width: 8′
Roof pitch: 32°
| Size | Actual Dimensions |
|---|---|
| 8′ x 8′ | 8’5″ W × 8’5″ L |
| 8′ x 12′ | 8’5″ W × 12’6″ L |
| 8′ x 16′ | 8’5″ W × 16’6″ L |
| 8′ x 20′ | 8’5″ W × 20’6″ L |
| 8′ x 24′ | 8’5″ W × 24’7″ L |
Every MONT Greenhouse kit includes:
- Aluminum framing & 8mm polycarbonate glazing
- Hinged double door (pre-assembled)
- Hardware
- Anchoring hardware
- Screwdriver & wrench
| Vent Type | Dimensions | 8′ x 8′ | 8′ x 12′ | 8′ x 16′ | 8′ x 20′ | 8′ x 24′ |
|---|---|---|---|---|---|---|
| Roof Vent + Auto Opener | 24″ x 24″ | 1 | 2 | 3 | 4 | 5 |
The Premium Package Additionally includes:
- Full-length foldable workbench
- Programmable watering system
- Sink system
- Interior shade cloth with bungee balls
Specifications
| Brand | MONT |
|---|---|
| Distributed by | Riverstone Industries |
| Made in | USA |
| Width | 8' |
| Length | 8', 12', 16', 20', 24' |
| Floorspace | 65 sq ft, 99 sq ft, 132 sq ft, 165 sq ft, 195 sq ft |
| Peak Height | 7'5" |
| Side Wall Height | 4'8" |
| Framing Material | Aluminum |
| Frame Color | Black |
| Roof Glazing | 8mm twin-wall polycarbonate |
| Wall Glazing | 8mm twin-wall polycarbonate |
| Roof Pitch | 32° |
| Roof Vent Opener Type | Automatic (wax) |
| Roof Vent Dimensions | 24" x 24" |
| Door Type | Double, Hinged |
| Door Dimensions | 48" x 72" |
| Foundation Frame | Integrated Base |
| Wind Rating | 65 mph |
| Snow Tolerance | 24 psf |
| Rainwater Collection | Gutter with downspouts on both sides |
| Stem Wall Compatibility | No |
| Expandable | Yes |
| Warranty | 10 years on frame and polycarbonate |
What foundation do I need?
Picking a level site is the best first step. It is important that the foundation is level and strong enough to hold the greenhouse. A concrete slab or a concrete perimeter wall will provide the most solid, long-lasting base. The key is that your foundation is level, square, and well-draining—even small twists can affect door operation and panel fit.
Helpful guides:
Do the roof vent openers require electricity?
No. They are wax-cylinder openers, which expand and contract with temperature to open/close the vent—so there’s no wiring and no power required.
Where does this ship from?
Georgia
Made & Distributed by
Riverstone Industries: Made in the USA
Riverstone Industries is the team behind MONT greenhouses and many of the eco-friendly, education-ready products we carry. They’re known for practical, well-supported designs and a strong commitment to American manufacturing—today, roughly 90% of their products are made in the USA.
Explore Riverstone ProductsAdditional information
| Distributed by | Riverstone Industries |
|---|---|
| Door Dimensions | 48" x 72" |
| Door Type | Double, Hinged |
| Expandable | Yes |
| Floorspace | 65 sq ft, 99 sq ft, 132 sq ft, 165 sq ft, 195 sq ft |
| Foundation Frame | Integrated Base |
| Frame Color | Black |
| Framing Material | Aluminum |
| Length | 8', 12', 16', 20', 24' |
| Made in | USA |
| Peak Height | 7'5" |
| Rainwater Collection | Gutter with downspouts on both sides |
| Roof Glazing | 8mm twin-wall polycarbonate |
| Roof Pitch | 32° |
| Roof Vent Dimensions | 24" x 24" |
| Roof Vent Opener Type | Automatic (wax) |
| Side Wall Height | 4'8" |
| Stem Wall Compatibility | No |
| Wall Glazing | 8mm twin-wall polycarbonate |
| Warranty | 10 years on frame and polycarbonate |
| Width | 8' |
| Style | Conventional |
| Snow Tolerance | 24 psf |
| Wind Rating | 65 mph |
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