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20×40 greenhouse

GK20

The 20x40 greenhouse is a versatile commercial-grade growing solution that serves family farms and professional nurseries alike. It offers generous space for multiple crop rows and extends the growing season by months, shielding produce from sudden rain and harsh UV. Durable, adaptable, and easy to assemble, this 20 by 40 greenhouse delivers strong resale potential, making it a must-stock item for wholesalers targeting the agricultural and horticultural markets.

[Advantages]
- Spacious Design
- Cost-Effective
- Heavy-Duty Steel Frame
- UV-Resistant PE Cover
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20ft GREENHOUSE SPECIFICATIONS

  • INCH
  • CM





MEASUREMENTS




Width (ft) 20
Length (ft) 40
Height (ft) 10
Surface area (sqft) 800
Volume (cuft) ~7500
Roof Style Round







FRAME BUILD






Frame Material Tensile steel pipe
Tube Diameter (in.) 1.6"
Tube thickness (bwg) 17
Surface finish Zinc coat (HDG)
About Connectors Steel Plate, Zinc coat (HDG) finished
Leg Type Straight
Span (ft) 5
Assembly Method "Fit&Bolt" + ratchet tensioning



FABRIC COVER


Cover Material PE (polyethylene)
Fabric density (oz/yd2) 8.85
Performance Waterproof, UV blockers, fade resistant
Color Green



DOORS & VENTS


Gable Door (in.) 47" x 78"
Rear Wall Door with Lock
Windows 16
Vents Side windows


SET UP & ANCHORING

Cover Tensioning Sleve & Ratchet Ties
Assembly time (est.) ~1 day (3 people)
Anchoring Foot plates + Auger anchors set

20ft POLYTUNNEL OPTIONS

Anchoring
Concrete Gravel Soil Sand
Cover Color
White Green
Vents
Side Windows Roll up Sides
Doors
Front Door Back Door Roll Up (up and down)
Send DELITE your required quantity, frame tube specification, PE film thickness, door and ventilation requirements, packaging needs, and destination country. We can provide a customized 20x40 greenhouse price and wholesale solution for your market. Contact Us

GREENHOUSE 20x40 PICTURES

Wire Fencing Ranges
CUSTOMIZE YOUR PRODUCTS
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20x40 COMMERCIAL GREENHOUSE FEATURES

  • SPACIOUS DESIGN

  • COST-EFFECTIVE

  • HEAVY-DUTY STEEL FRAME

  • UV-RESISTANT PE COVER

The greenhouse20ft offers approximately 200 sq ft of growing area and 5,455 cubic feet of space. That’s plenty of room for multi-row planting, nursery racks, or large equipment storage. Its clear-span design allows for maximum use of interior space without obstructive pillars. Each 20ft unit can accommodate up to 120 seedling trays (1sq ft each) or six 2 ft-wide planting rows, maximizing yield in limited space.
Designed as an affordable entry-level option for commercial growers, this 20ft polytunnel offers a practical balance of cost and functionality. Its straightforward structure helps reduce the upfront investment compared with more complex greenhouse systems that require professional installation, making it a cost-effective choice for expanding growing capacity.
Built with 1.57” diameter, 17 BWG thick steel tubes, the 20ft greenhouse features a robust frame designed for demanding outdoor conditions. For projects requiring greater strength, larger diameters and thicker tube walls are also available. This heavy-duty construction provides a solid foundation for long-term greenhouse use and improved structural stability.
This 20x40 greenhouse plastic cover uses UV-stabilized polyethylene film. The reference system supports 8–12 mil PE film, approximately 5.9–8.85 oz/yd², with high transparency and optional anti-drip treatment. For buyers searching for 20 x 40 greenhouse plastic or a 20x40 greenhouse cover, film thickness and treatment can be selected according to market requirements.
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    20 by 40 GREENHOUSE MANUFACTURING
    Efficient manufacturing starts with effective material management. DELITE, as 20x40 greenhouse manufacturer, we purchase key raw materials through centralized sourcing, helping reduce procurement costs and maintain a stable supply for production. These materials then move through an organized workflow covering steel processing, fabric cutting and heat welding, inspection, and packaging. By combining purchasing efficiency with controlled production, we provide B2B customers with a practical balance of competitive pricing, consistent quality, and dependable supply.
    20ft TUNNEL GREENHOUSE EXPORT
    Our export service is designed around the purchasing needs of wholesalers, retailers, and distributors. DELITE provides detailed quotations, coordinates production schedules, and keeps orders moving according to the agreed lead time. Take 20x49ft greenhouse for example, one 40HQ container can load 52sets. Once production and quality inspections are completed, we arrange cargo transportation and shipment based on the buyer's requirements. Multiple payment and logistics options provide greater flexibility for different markets and purchasing models.
    20x40 GREENHOUSE USER CASES

    Use case #1: Thompson Family Farm – Year-Round Vegetable Production

    The Thompson family operates a mid-sized vegetable farm in the Pacific Northwest. With unpredictable weather patterns and a growing demand for local produce, they needed a reliable growing solution. They installed a 20x40 greenhouse kit last season. The 20ft wide polytunnel now houses four rows of tomato plants and two rows of peppers, with enough space between rows for their electric cart. The 2.9m peak height allows proper air circulation, while the 5.9 oz/yd² UV-stabilized PE cover protects crops from sudden rain and harsh sun.

    Last winter, they extended their growing season by nearly three months. The family is now planning to add more 20ft wide polytunnels for leafy greens.

    Use case #2: Henry’s Nursery – Commercial Propagation Hub

    Henry’s Nursery supplies seedlings to over 50 local retailers. They need a cost-effective propagation space that could withstand high winds and coastal humidity. They choose greenhouse 20x40 with galvanized steel frame and roll-up side ventilation. The 800sqft growing area now accommodates over 3,000 starter trays on benches. The hot-dip galvanized frame has shown zero corrosion after two coastal seasons, and the PE film cover maintains consistent humidity for optimal germination rates.

    Henry has since ordered three more 20x40 greenhouse kits for expansion and is now distributing our greenhouse kits to other nurseries in their network.

    20x40 GREENHOUSE FAQ

    • What materials are used in the 20x40 greenhouse frame?
      The 20x40 commercial greenhouse frame uses high-tensile galvanized steel with 1.26” to 2" diameter tubing, 18BWG to 17BWG tube thickness, finished with zinc-rich hot-dip galvanization for superior corrosion resistance.
    • How long does the greenhouse 20x40 plastic cover last?
      The 8–12mil UV-stabilized agricultural PE film has a 3-5 year life expectancy under normal conditions.
    • How is the 20x40 commercial greenhouse shipped?
      20x40 greenhouse shipping is prefabricated and flat-packed for efficient container shipping. We provide shipping quotes and loading plans for 20ft, 40ft, and 40HC containers with FCL and LCL options.
    • What is the minimum order quantity for 20x40 greenhouse wholesale?
      We support wholesale buyers with flexible MOQs. Contact us for wholesale pricing and customized quotes based on your order volume.
    • Is the green house 20x40 suitable for commercial farming?
      Absolutely. The 20ft width provides ample space for multi-row commercial planting with room for trolleys and small machinery. It is designed specifically for commercial growers, horticulturists, and farmers.
    DELITE Portable Structures chinese manufacturing company
    • Founded in 2016 by 2 inspired friends from vastly different fields, DELITE was born from a common goal: to create popular kit buildings that protects what matters. From a humble workshop, we now leverage 3 product-centric manufacturing lines. Our vision as a portable structures manufacturer is to make resilient shelters affordable and easy to assemble as a response to a shifting environment.
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