Greenhouse Megastore Promo Codes and Coupons December 2025

Greenhouse Megastore

Greenhouse Megastore is a leading online retailer specializing in greenhouse structures, gardening supplies, and growing equipment. They offer a wide range of products from small hobby greenhouses to commercial-grade structures, along with accessories, ventilation systems, and growing supplies. The company serves both individual gardeners and commercial growers across the United States.

greenhousemegastore.com

Today's Greenhouse Megastore discount codes

TOP PICK

10% off

1516 uses

high

worked about 1 month ago

10% Off Storewide at Greenhouse Megastore

10% off

1024 uses

high

worked about 1 month ago

10% Off Storewide at Greenhouse Megastore

5% off

219 uses

high

worked about 1 month ago

5% Off Select Items at Greenhouse Megastore

10% off

254 uses

high

worked about 1 month ago

10% Off Storewide at Greenhouse Megastore

Featured Greenhouse Megastore Products

Gro Pro® Premium Round Black Nursery Pot

The Gro Pro® Premium Nursery Pots are the best quality pots on the market! These injection molded pots have impact-modified plastic for extra strength and durability. They are much thicker and more durable than traditional blow molded nursery pots and other injection molded pots. Wide rim with grip lip for easy movement. They are reusable pots offering a long life, because of their high quality. Made in the USA. BPA-Free. Premium Round Black Nursery Pot Features: Superior strength and durability Wide rim with grip lip for easy movement Reusable and long lasting Made in USA BPA free Specifications: 1 Gallon - 5.3" dia. x 6.9" H, 0.235 lb., 0.146 cf.2 Gallon - 8.7" dia. x 8.6" H, 0.480 lb., 0.398 cf.7 Gallon - 15.5" dia. x 12" H, 1.55 lb., 1.51 cf.25 Gallon - 24.5" dia. x 19.2" H, 6.6 lb., 5.029 cf.

USD 13.75

Cathedral Victorian Greenhouse 15 x 20 ft. with 4mm Tempered Glass Panels and Aluminum Frame

Key Details | Cathedral Victorian 15 x 20 Greenhouse Dimensions: 15' W x 19'11" L x 12'2" H; 300 sq. ft.Cupola: 5' 4" W x 10' 2" L Sidewall: 6' 8" Frame: Aluminum Color: Bronze (Black also available) Covering: 4mm Tempered Glass Door(s): One double set of hinged doors with...

USD 45999.00

Gabriel Ash Rosemoor Combo Greenhouse/Shed Kit with Tempered Glass and Red Cedar Wood Frame

Key Details | Rosemoor Combo Greenhouse & Shed Dimensions: Greenhouse: Greenhouse: 6' W x 8' L, Shed: 7' W x 4 1/2' L Frame: Red Cedar Color: Wood Covering: Greenhouse: Tempered Glass Shed: Corrugated Powder-coated Aluminum Door(s): Hinged Base: Aluminum Plinth Foundation: Options - Stakes; Treated 4x4's; Concrete Piers or Slab More foundation information Specifications: Rosemoor Combi Specifications Sheet (PDF) If you need a greenhouse and a storage shed but don't have the space and budget for two structures, the Gabriel Ash Rosemoor Combi will come to the rescue. Is it a shed with a greenhouse attached, or a greenhouse with an added shed? Either way, greenhouse sheds made of natural red cedar wood are convenient and look great. The Rosemoor Greenhouse Shed Combo uses tempered glass side panels and a mix of glass and corrugated aluminum roofing for an optically clear, well-protected structure. It has an automatic ventilation ridge that opens when the interior reaches a certain temperature. Other useful features include downspouts, drainage gutters, a glazed swinging door and neoprene weatherproofing gaskets. A cedar gable with a door-sized opening separates the shed from the greenhouse, allowing heat to flow between the two spaces for added efficiency. Installing a garden shed greenhouse is simple and offers plenty of possibilities for hobby growers. When you order the Gabriel Ash Rosemoor, you're getting the only DIY wood greenhouse that is officially recommended by the UK Royal Horticultural Society - so enjoy a truly noble backyard structure. The Rosemoor Combi greenhouse should be professionally assembled by a contractor. Greenhouse Megastore can also provide an erected price. These hobby greenhouse kits are special ordered from the Gabriel Ash factory in the UK. They have a 90-day lead time and require full pre-payment prior to shipping. Shipping will be quoted per order. Free Shipping This item ships free via Motor Freight Carrier - almost anywhere in the Contiguous United States Motor Freight Requirements The shipment must be delivered to a business or residence (a PO Box is invalid) The delivery address must be able to accommodate a tractor/trailer as much as 70' in length Someone must be present to receive and unload the shipment from the truck Shipments and/or locations requiring a lift gate, inside delivery, and/or with limited access may incur additional charges by the carrier Please contact Greenhouse Megastore Customer Service at 1-888-281-9337 if you have any questions about delivery to your specific address so we can ensure the smoothest delivery possible!

USD 26732.00

SunShed Garden Building and Greenhouse Kit 12 x 12 ft. with Glass Panels and Cedar Wood Frame

Key Details | Sunshed 12 x 12 Greenhouse Dimensions: 12' W x 12' L x 9' H (at its tallest point) Frame: Wood Color: Cedar Covering: Glass Door(s): 1 Locking Door Base: Integrated Foundation: Options: Stakes, Treated 4x4's, Concrete Piers or SlabMore foundation information Warranty: 1 Year Part storage and work shed, part greenhouse, part outdoor relaxation hub, all-weather strength. The Sunshed Garden Shed is crafted from Western Red Cedar, a wood known for its natural beauty and resistance to decay. This makes it one of the most durable and visually appealing outdoor structures available. Whether you use it as a greenhouse to jump-start your growing season, a hobby space filled with natural light for creative pursuits, or a stylish storage solution offering 864 cubic feet of functional space, the choice is yours. The point is, now you've got options with great style! The Sunshed has 10 aluminum-frame, tempered glass windows along the side, and 6 Lexan skylights on the roof, which allow 90% of the light through while blocking harmful UV rays, keeping plants, equipment, and people protected. The 16" wide L-shaped Red Cedar wall workbench is great for getting jobs done, for relaxing and eating at, or, if desired, can even serve as a shelving unit for plants. The Sunshed also comes with 7 flower boxes and a 31" wide Dutch door, which makes for easy and comfortable access while also giving the shed a charming look. Shipped in knockdown panels, the Sunshed assembly normally takes two to three days to complete with a helper and includes a detailed homeowner's assembly manual, with all necessary hardware included. The cedar roof comes with shingles already attached, while the wood comes unfinished, and can be painted, stained, or allowed to weather naturally. Additional Information Assembly Instructions (PDF) Site Prep Info (PDF) Free Shipping This item ships free via Motor Freight Carrier - almost anywhere in the Contiguous United States Motor Freight Requirements The shipment must be delivered to a business or residence (a PO Box is invalid) The delivery address must be able to accommodate a tractor/trailer as much as 70' in length Someone must be present to receive and unload the shipment from the truck Shipments and/or locations requiring a lift gate, inside delivery, and/or with limited access may incur additional charges by the carrier Please contact Greenhouse Megastore Customer Service at 1-888-281-9337 if you have any questions about delivery to your specific address so we can ensure the smoothest delivery possible!

USD 11925.00

What Greenhouse Megastore coupons are available today?

We track so many discount codes. Read about today's Greenhouse Megastore coupon statistics.

Greenhouse Megastore deals available today

Active Greenhouse Megastore codes

10% off

Biggest discount available

Get the best Greenhouse Megastore promo codes and coupons that actually work. Our community of sustainability minded shoppers helps you save by testing and sharing:

Verified promo codes with live success rates from recent shoppers!
Exclusive single-use codes shared by our community (29 active codes).
Drop alerts when Greenhouse Megastore's most popular items go on sale!
Deals for those who want extra savings opportunities
Insider savings tips from experienced Greenhouse Megastore shoppers who know the best deals.

Why TerraCoupons finds better Greenhouse Megastore discounts:

Live success tracking: See exactly which codes are working for other shoppers right now
Real-time feedback: Every code attempt is tracked and ranked to show you the best options first
Sale predictions: Get alerted when Greenhouse Megastore's next big discount event is coming
Exclusive savings: reseller discounts, shopping tips and sustainability tips you won't find elsewhere

Note: Our community tests every Greenhouse Megastore promo code and shares results in real-time. Check success rates and shopping tips in the activity feed to find what works best for your purchase.

5% off

41 uses

high

worked about 1 month ago

5% Off Storewide at Greenhouse Megastore

5% off

19 uses

medium

worked 11 months ago

Score 5% off with promo code

20% off

7 uses

medium

worked 9 months ago

Get 20% off with coupon code

25% off

46 uses

low

worked 11 months ago

25% Off Seed Starting Basics Collection at Greenhouse Megastore

More Greenhouse Megastore Products

Gabriel Ash Portico Series Greenhouse Kit 11 x 14 ft. with Tempered Glass Panels and Red Cedar Wood Frame

Key Details | Portico 11 x 14 Greenhouse Dimensions: Greenhouse: 11 ft. 7 in. (3548mm) x 14 ft. 1 in. (4310mm) Frame: Red Cedar Color: Wood Covering: Tempered Glass Door(s): Hinged Base: Aluminum Plinth Foundation: Options - Stakes; Treated 4x4's; Concrete Piers or Slab More foundation information Specifications: Portico Series Specifications Sheet (PDF) The only wooden greenhouse kit endorsed by the Royal Horticultural Society. The Portico Series of greenhouses are made from Western Red Cedar, which is a stable and long-lasting wood often used in harsh climates where strength is a necessity. When red cedar absorbs moisture, its naturally occurring preservatives are triggered and the moisture is quickly released into the air, helping to give red cedar its longevity. All of the red cedar used for these greenhouses comes from certified or sustainable forests. The Portico greenhouses are covered in tempered safety glass and weather protected with powder-coated aluminum features. The aluminum gutters and downspouts are designed for easy compatibility with rain barrels and water tanks. The cedar roof is protected by hand-turned cedar caps and neoprene gaskets for additional weather protection. The steep-pitched roof helps prevent snow buildup, while an automated heat-sensitive ventilation system runs the length of the greenhouse, releasing heat at the most advantageous point. Each greenhouse sits on its own aluminum plinth, which raises the greenhouse off the ground and provides a stronger fixing point for the foundation. Any Portico Series greenhouse should be professionally assembled by a contractor. Greenhouse Megastore can also provide an erected price. These hobby greenhouse kits, special ordered from their UK factory, have a 90 day lead time, and require full pre-payment prior to shipping. Free Shipping This item ships free via Motor Freight Carrier - almost anywhere in the Contiguous United States Motor Freight Requirements The shipment must be delivered to a business or residence (a PO Box is invalid) The delivery address must be able to accommodate a tractor/trailer as much as 70' in length Someone must be present to receive and unload the shipment from the truck Shipments and/or locations requiring a lift gate, inside delivery, and/or with limited access may incur additional charges by the carrier Please contact Greenhouse Megastore Customer Service at 1-888-281-9337 if you have any questions about delivery to your specific address so we can ensure the smoothest delivery possible!

USD 35477.00

Sigma DIY Greenhouse Kit 10 x 26 ft. with 6mm Double-Wall Polycarbonate Panels and Galvanized Steel Frame

Key Details | Sigma 10 x 26 Greenhouse Dimensions: Approx Size: 10' W × 26' L × 7' H Sidewall: n/a Frame: Galvanized Steel - Heavy Duty, Rust-Resistant Color: Silver Covering: 6mm Double-Wall Polycarbonate Panels Door(s): 2 - 1 at each end Roof Vents: 0 End Vents: 2 - Manual,...

USD 3950.00

Sigma Urban DIY Greenhouse Kit 10 x 13 ft. with 6mm Double-Wall Polycarbonate Panels and Galvanized Steel Frame

Key Details | Sigma Urban 10 x 13 Greenhouse Dimensions: Approx Size: 10' W × 13' L × 7' HExact size: 118.1 x 83.9 x 158.29 inches Sidewall: n/a Frame: Galvanized Steel - Heavy Duty, Rust-Resistant Color: Silver Covering: 6mm Double-Wall Polycarbonate Panels Door(s): 2 Roof Vents: 0 End Vents: 2 - Manual, located above each door Side Vents: 0 Base:Can Be Installed with or without a base Foundation: No foundation required Warranty: 5 Year Manufacturer Warranty Manual: Sigma Installation Manual (PDF) The Planta Sigma Urban was designed for passionate gardeners looking to maximize their growing potential in compact urban and suburban spaces. Ideal for three- or four-season gardening, this greenhouse allows you to enjoy fresh, homegrown fruits and vegetables year-round. As part of the Sigma collection, it combines sturdy construction with a spacious design, bringing the benefits of heavy-duty greenhouse engineering to your backyard. Built to withstand harsh weather conditions, the Sigma Urban features a rust-resistant galvanized pipe frame that ensures durability and protection for your plants throughout the year. Its thoughtfully designed structure promotes end-to-end airflow, creating a comfortable growing environment. The distinctive 7-foot roof height enhances accessibility and ease of movement, making gardening a pleasure all day long. Engineered for strength and reliability, the Sigma Urban is wind-resistant up to 65 mph and can support a snow load of up to 3 feet (32 psf). It includes two doors—one at each end—for convenient access, while the arched shape allows wind, snow, and hail to slide off effortlessly. Made with a heavy-duty galvanized pipe frame and 6mm double-wall polycarbonate panels, this greenhouse offers long-lasting performance. Additionally, its extendable design lets you expand beyond 100 feet whenever you're ready. Backed by a 5-year warranty, the Sigma Urban is a smart investment for any dedicated gardener. Snow Load Weight of 32 psf (160 kg / m²) Equal to 3 feet fresh snow layer or 1.5 feet packed snow layer and is maintenance free in the winter Wind Resistant Up to 65 mph (100 km/h) Extendable & Customizable This greenhouse can be extended with additional expansion kits (call to order) This item ships via Motor Freight Carrier - almost anywhere in the Contiguous United States Motor Freight Requirements The shipment must be delivered to a business or residence (a PO Box is invalid) The delivery address must be able to accommodate a tractor/trailer as much as 70' in length Someone must be present to receive and unload the shipment from the truck Shipments and/or locations requiring a lift gate, inside delivery, and/or with limited access may incur additional charges by the carrier Please contact Greenhouse Megastore Customer Service at 1-888-281-9337 if you have any questions about delivery to your specific address so we can ensure the smoothest delivery possible!

USD 2500.00

Sunshine DIY Gardenhouse Kit 8 ft. Wide with 4mm Twinwall Polycarbonate Panels and Redwood Frame

Key Details | Sunshine 8 ft. Greenhouse Dimensions:8' W x 8', 12' or 16' L x 10' H Sidewall: n/a Frame: Natural redwood Color: Redwood Covering: 4.5mm Twin-wall polycarbonate panels Door(s): 28" W x 78" H lockable hinged Dutch door;optional 39" wide door available Roof Vents: 2 (2 Auto) End Vents: 0 Side Vents: 2 (2 Auto) Base: Integrated - Made with recycled plastic (Trex) Foundation: No foundation required. Anchor kit available Warranty:5-year frame, 10-year poly Manual: Instruction manual and video included Sunshine GardenHouse greenhouse kits are designed for easy assembly while delivering commercial-grade performance for hobby growers. Crafted in the U.S. from all-natural redwood, these beautiful greenhouses come with a range of premium features not typically found in other kits. As part of the Mt. Rainier series, these eight-foot-wide structures feature a sturdy redwood frame and twin-wall polycarbonate panels for the roof and siding. For those who need more growing space, an optional extension kit allows the 8' x 12' model to expand by an additional four feet. Each GardenHouse backyard greenhouse is built for convenience and efficiency, featuring four vents with automatic openers and lockable Dutch doors for secure access. With up to four optional benches, you can maximize your growing area for crops and seedlings. The base, made from recycled plastic, eliminates the need for a foundation and is designed to resist rot over time. Assembly is straightforward with pre-assembled panels, step-by-step instructions, and an instructional video, making it possible to set up your GardenHouse in less than a day. Additionally, an optional 39-inch-wide wheelchair-accessible door is available for added accessibility. Engineered for durability, the Sunshine GardenHouse is wind-tested to withstand speeds of up to 80 mph and features a 45-degree roof pitch to prevent snow buildup. The naturally rot-resistant redwood frame requires no maintenance and is built to last for decades. Its 4.5mm twin-wall polycarbonate panels are UV-treated and provide up to 250 times the impact resistance of glass. Strong zinc-plated metal connecting brackets secure the greenhouse sections together for long-term stability. Auto-opening roof and side vents ensure optimal temperature control, and an optional door can be installed at both ends at no additional cost. Free Shipping This item ships free via Motor Freight Carrier - almost anywhere in the Contiguous United States Motor Freight Requirements The shipment must be delivered to a business or residence (a PO Box is invalid) The delivery address must be able to accommodate a tractor/trailer as much as 70' in length Someone must be present to receive and unload the shipment from the truck Shipments and/or locations requiring a lift gate, inside delivery, and/or with limited access may incur additional charges by the carrier Please contact Greenhouse Megastore Customer Service at 1-888-281-9337 if you have any questions about delivery to your specific address so we can ensure the smoothest delivery possible!

USD 5178.00

20% off

27 uses

low

worked 12 months ago

20% Off (Storewide) (Minimum Order: $200) at Greenhouse Megastore

20% off

17 uses

low

worked about 1 year ago

20% Off (Storewide) at Greenhouse Megastore

20% off

35 uses

low

worked about 1 year ago

20% Off (Storewide) at Greenhouse Megastore

10% off

16 uses

low

worked about 1 year ago

10% Off Storewide at Greenhouse Megastore

Sustainability Score

52%

While the company sells products that promote sustainable gardening, their own corporate practices lack transparency. Limited information is available about their supply chain ethics, energy usage, or waste management policies. They provide minimal reporting on environmental impact and labor conditions. Some positive aspects include their promotion of local food production and water conservation education, but overall corporate responsibility documentation is insufficient.

About Greenhouse Megastore

3.0 (3)

FAQs

: The biggest sales typically occur during Black Friday/Cyber Monday, end-of-season clearances in late summer, and early spring promotions in February/March.
: Yes, they offer a 5% military discount, bulk order discounts, and seasonal promotional codes. They also have a clearance section with year-round discounts.
: The best time to purchase is during off-season periods, typically late fall or winter (November-January), when prices are lower and there's less demand.
: Yes, they offer price matching on identical items from authorized dealers, excluding auction sites and closeout sales.
: In the past month, Greenhouse Megastore has launched 0 new promo coupons for shopper discounts. This indicates that Greenhouse Megastore does not provide regular opportunities for customers to save money on their purchases.
: On average, Greenhouse Megastore provides 4.5 discount coupons each month. Based on historical data, the average time between Greenhouse Megastore coupon releases every 7 days. However, this rate depends on various factors such as seasonal promotions (Black Friday, Cyber Monday, etc.), product launches, or other marketing initiatives. To stay informed about upcoming discounts and promotions, we recommend checking Greenhouse Megastore website regularly, subscribing to email newsletters, and following them on social media.
: Greenhouse Megastore is offering 5 working store-wide codes, however they are also offering 24 additional discount codes with a best discount of 10% off
: terra.coupons is the #1 provider of discount codes for your favorite retailers, such as Greenhouse Megastore. As a crowd-sourced platform for coupon codes, we accurate codes for over 10,000 stores. Save time and avoid expired codes by checking terra.coupons for the latest Greenhouse Megastore discount codes.

Curated by

Aleksa P.

Deal Curator

Last updated December 2025

Aleksa is a deal finder from the tech-savvy city of Austin, Texas. A keen coder by day and a discount guru by night, Aleksa checks back regularly to update you with new deals.

Latest Greenhouse Megastore coupon activity

Track real-time Greenhouse Megastore coupon activity from our community. See which codes are working right now at Greenhouse Megastore, when they were last verified, and any usage restrictions. Our feed helps you quickly find active codes and avoid expired ones.

From the blog

2025-04-29

Greenhouse Megastore Promo Codes and Coupons December 2025