Greenhouse Megastore Promo Codes and Coupons September 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

369 uses

high

worked about 2 months ago

10% Off Storewide at Greenhouse Megastore

10% off

368 uses

high

worked about 2 months ago

10% Off Storewide at Greenhouse Megastore

5% off

195 uses

high

worked about 2 months ago

5% Off Select Items at Greenhouse Megastore

10% off

32 uses

high

worked about 2 months ago

10% Off Storewide at Greenhouse Megastore

Featured Greenhouse Megastore Products

Panterra Planter Pots

Looking for a reliable drain bottom pot for your plants just as beautiful as the flowers you're growing? Order Panterra Pots in small packs or buy them in bulk at wholesale prices today from Greenhouse Megastore. These attractive "clay-look" textured pots are designed to complement the natural beauty of your plants. Panterra pots can be used as a grower or florist pot or as a decorative cover for finished potted plants. Our Panterra Pots are ideal for potted flowering plants, mixed annuals, foliage, garden mums and poinsettias and other colorful flowering arrangements. The dual drain bottoms provide optimum drainage and aeration. Order Panterra Pots today, or explore other decorative planters. For all of your indoor, outdoor and greenhouse garden supply needs, we hope you'll shop with us here at Greenhouse Megastore. Specifications Description Outside Diameter (Top) Outside Diameter (Bottom) Inside Diameter Height Capacity Cubic Inches 4" Pots 4 1/2" 2 4/5" 4" 3-3/4" 33 6" Pots 6 5/8" 4 1/2" 6-1/8" 5 1/8" 103 8" Pots 8 7/8" 6" 8-1/8" 6" 221 10" Pots 11 1/8" 7 1/2" 10-1/8" 7 3/4" 360 12" Pots 13 1/4" 8 7/8" 12-1/8" 9 1/2" 774 14" Pots 15 5/8" 10 1/2" 14-1/8" 11 3/8" 1280 Note: Sizes and colors may vary slightly.

USD 14.40

74 Gallon Eco Composter

The Eco Composter turns kitchen waste into rich compost. Constructed from 100-Percent recycled UV-resistant polypropylene. Just rotate the lid when ready to fill composter. Lateral ventilation slots for fast composting. Sliding bottom exit door. Smooth interior and exterior for easy cleaning. 31 in. deep by 33 in. high 16.4 pounds 100% recycled UV-resistant polypropylene Sits directly on the ground

USD 135.00

Large Nursery Containers

This larger version of our popular blow-molded nursery containers are ideal for small shrubs, perennials and tropicals at an amazingly low price. (Pruners not included).Dimensions Trade Size Top Dia. In. Height In. Lqd. Gallon(s) Liter(s) #7 14 11 1/2 6.51 24.68 #10 15 3/4 15 10 37.93 #15 17 3/4 16 14.9 56.78 #25 23 3/4 18 1/8 26.5 100.32

USD 108.92

Black Euro Pots

These co-extruded pots can be used over and over again. Metric sizes ideal for perennials and annuals Tri-level bottom drainage Heavy duty rim Made from durable polypropylene material Specifications Description Outside Diameter Height Volume 15 cm Short, Black 6" 4-1/4" 1.37 qt 15 cm Tall, Black 6" 5-1/8" 1.65 qt 17 cm Short, Black 6-5/8" 5" 2 qt 17 cm Tall, Black 6-5/8" 6" 2.58 qt 19 cm Short, Black 7-1/2" 5-3/4" 3 qt 19 cm Tall, Black 7-1/2" 7-3/8" 4 qt 21 cm Short, Black 8" 5" 3.22 qt 21 cm Tall, Black 8" 7-1/4" 4.44 qt

USD 2.90

What Greenhouse Megastore coupons are available today?

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Greenhouse Megastore deals available today

Active Greenhouse Megastore codes

10% off

Biggest discount available

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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

3 uses

high

worked about 2 months ago

5% Off Storewide at Greenhouse Megastore

5% off

19 uses

medium

worked 8 months ago

Score 5% off with promo code

20% off

7 uses

medium

worked 6 months ago

Get 20% off with coupon code

25% off

45 uses

low

worked 8 months ago

25% Off Seed Starting Basics Collection at Greenhouse Megastore

More Greenhouse Megastore Products

Standard Round Pots

A round plant pot is an efficient way to grow plants as their final home or as the next step up from seedling trays. Our round plant pots are made of sturdy lightweight plastic and hold more soil than azalea pots of the same size. The bottom drainage holes help maintain ideal moisture levels. The high-gloss green color is perfect for any greenhouse or retailer, offering a clean appearance that keeps the focus on the plant. With diameters ranging from three to eight inches, round pots for plants offer many growing options, letting you cultivate tropicals, geraniums and many other annuals. Click on our Potting Guide below for an overview of available circle flower pot sizes and their soil volume. All standard round pots are available in a basic 10-pack for hobby growers or large cases for commercial greenhouses and nurseries. Contact us if you need recommendations on which flower pots to buy or are looking for other advice. Specifications Description Outside Diameter x Height Capacity Cubic Inches 4" Std. Round 4" x 3-1/2" 32 4.5" Std. Round (Geranium) 4-1/2" x 4" 40 6" Std. Round 6" x 5-3/4" 112 Additional Information Potting Guide

USD 2.60

Garland Handy Tray

Whether utilized for cultivating wheatgrass, fodder, or seeds in gardening endeavors or employed in the kitchen as a catchment tray or organizer, the Garland Handy Tray is a practical and adaptable accessory to have on hand. The tray is made from recycled polypropylene and has an extra thick outer rim for easy carrying. Garland Handy Tray Features: Multi-Functional Use: Ideal for diverse gardening applications, serving as a reliable container for cultivating wheatgrass, assorted fodder, and a variety of seeds. Enhanced Portability: Features an extra thick outer rim, ensuring easy handling and carrying, enhancing its usability across different applications. Recycled Construction: Crafted from recycled polypropylene, contributing to sustainability efforts while maintaining durability. Utility Tray: Beyond gardening, it proves beneficial for other tasks, serving as a catchment tray or organizer for smaller items. Dimensions: 16 in. L x 12 in. W x 1.5 in. H

USD 7.99

10mm Clear Twinwall Polycarbonate Panels

Our 10mm twinwall polycarbonate offers higher impact resistance and heat retention over thinner panels making it the perfect solution for a variety of greenhouse and architectural applications. Panel offers 79% light transmission and includes anti-condensate coating to prevent dripping. ThermaGlas Multi-wall Polycarbonate Sheet is designed and engineered specifically for commercial greenhouse use. ThermaGlas products are available in 4-foot or 6-foot widths in clear, or with specially formulated colors and tints. ThermaGlas offers 99.5% UV protection. The multiwall design and light weight of the sheet enables a reduction in the cost of the supporting structure. Shatterproof polycarbonate coupled with integrated UV resistant co-extruded layer yields long service periods backed up by a 10 year limited warranty. The cellular multi-layer structure reduces heating costs in winter while minimizing excessive heat in summer. A special coating on the bottom side eliminates condensation dripping. ThermaGlas blocks ultraviolet rays that burn plants and living tissues, and transmits only beneficial radiation. 10mm Thickness for double wall Custom Sizes Available Can be easily cut in any pattern using a circular saw with a fine tooth blade 79% light transmission 10 year limited warranty against UV degradation Approx. Weight: .45 lbs per sq. ft. Will Call Pick-up - Considerable savings can be realized by picking up your polycarbonate order. Certain sizes are available for will call pick-up at our locations in Illinois or Wisconsin. Longer Lengths and Custom Quantities Available - Panels over 12' are not listed online. However, longer lengths of this product are available as are non-pack quantities. Please call 1-888-281-9337 to obtain a quote from a Sales Representative. Custom Pricing and Purchase Orders - Email Us or call a representative at 1-888-281-9337 to place non-pack or quantity orders. Purchase orders are accepted from schools and institutions. Additional Information ThermaGlas Assembly & Storage Guide (PDF) Multi-wall Polycarbonate Installation Instructions (PDF) ThermaGlas Technical and Installation Guide (PDF) ThermaGlas Limited Warranty (PDF)

USD 1600.00

6mm Clear Twinwall Polycarbonate Panels

Our 6mm twinwall polycarbonate offers the same high impact resistance, excellent heat retention and 80% light transmission as the standard 8mm material. Thinner profile is perfect for hobby greenhouses or patio coverings. ThermaGlas Multi-wall Polycarbonate Sheet is designed and engineered specifically for commercial greenhouse use. ThermaGlas products are available in 4-foot or 6-foot widths in clear, or with specially formulated colors and tints. ThermaGlas offers 99.5% UV protection. . The multiwall design and light weight of the sheet enables a reduction in the cost of the supporting structure. Shatterproof polycarbonate coupled with integrated UV resistant co-extruded layer yields long service periods backed up by a 10 year limited warranty. The cellular multi-layer structure reduces heating costs in winter while minimizing excessive heat in summer. A special coating on the bottom side eliminates condensation dripping. ThermaGlas blocks ultraviolet rays that burn plants and living tissues, and transmits only beneficial radiation. 6mm Thickness for double wall Custom Sizes Available Can be easily cut in any pattern using a circular saw with a fine tooth blade 80% light transmission 10 year limited warranty against UV degradation Approx. Weight: .3 lbs per sq. ft. Will Call Pick-up - Considerable savings can be realized by picking up your polycarbonate order. Certain sizes are available for will call pick-up at our locations in Illinois or Wisconsin. Longer Lengths and Custom Quantities Available - Panels over 12' are not listed online. However, longer lengths of this product are available as are non-pack quantities. Please call 1-888-281-9337 to obtain a quote from a Sales Representative. Custom Pricing and Purchase Orders - Email Us or call a representative at 1-888-281-9337 to place non-pack or quantity orders. Purchase orders are accepted from schools and institutions. Additional Information ThermaGlas Assembly & Storage Guide (PDF) Multi-wall Polycarbonate Installation Instructions (PDF) ThermaGlas Technical and Installation Guide (PDF) ThermaGlas Limited Warranty (PDF)

USD 1260.00

20% off

23 uses

low

worked 9 months ago

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

20% off

17 uses

low

worked 9 months ago

20% Off (Storewide) at Greenhouse Megastore

20% off

35 uses

low

worked 10 months ago

20% Off (Storewide) at Greenhouse Megastore

10% off

16 uses

low

worked 10 months 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 23 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 September 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 September 2025