Greenhouse for lettuce with a single span galvanized steel frame and UV-stabilized PE film. The column-free interior spans up to 12 meters, keeping planting density high and air moving freely along the rows. A grooved channel locks the cover film without extra clips, and the hot-dip galvanized pipe resists rust over a 15-20 year service life backed by a 10-year structural warranty. Built around the planting schedule of commercial leafy vegetable farms, this structure fits lettuce, seedlings, strawberries and nursery crops, with optional cooling, irrigation and heating systems fitted at the factory. Custom sizing and engineer-guided installation support come standard from the Ziyang Bozong factory.
Lettuce growers do not have the luxury of waiting out a bad season. A head of iceberg can go from transplant to harvest in 35-45 days, which means every week of lost climate control is a full production cycle pushed back. A single span film greenhouse with a galvanized steel frame addresses this by putting a stable environment over your beds at a capital cost that a multi-bay structure cannot match.
This vegetable growing greenhouse keeps the frame simple - one arch, no internal columns, up to a 12-meter span - so planting density stays high and air moves freely along the rows. The aluminum grooved channel locks the PE film down without needing extra clips, and the hot-dip galvanized pipe resists rust far longer than painted tubing. For a leafy vegetable operation that replants monthly, this is the kind of structure that pays for itself within two or three crops.
Grooved channel film lock - Instead of fiddly clip-on covers, the film slides into an aluminum channel and stays put. We have used this method on farms with wind loads above 90 km/h, and the cover has stayed intact where clip systems pulled loose.
Hot-dip galvanized steel frame - The galvanized steel frame is rated for 15-20 years of service and backed by a 10-year structural warranty. Galvanizing thickness is checked at the factory before welding, a step many budget suppliers skip.
UV-stabilized PE cover film - The PEP film blocks the UV radiation that yellows lettuce leaves, while letting through the PAR light that drives growth. Expect 3-5 years of service from the film under normal conditions.
Single span, column-free interior - No center posts means your transplant trays, drip lines and harvest carts move without obstacles. Compared with a tunnel greenhouse of the same width, you get roughly 10% more usable bed area.
Optional add-on systems - Ventilation, drip irrigation, cooling pads and heating can be fitted at the factory or retrofitted later, which matters when you expand from spring-only growing to year-round cycles.
This film greenhouse is built around the planting schedule of a commercial leafy vegetable farm, and it adapts to several related crops. For growers running nutrient film or hydroponics system lettuce production, the column-free span gives gutter and tray lines an unobstructed run.
One supplier, whole structure - Frame, film, channels and accessories ship from one factory, so you do not piece together parts from five vendors and pray they fit.
Custom sizing without a big deposit - Tell us your bed width and row length, and we adjust span, height and vent positions to match. Most adjustments cost nothing extra.
Engineer-backed installation support - Our engineers guide on-site assembly, and for larger orders we can send a technician to your site. This is standard for projects above a container load, not a premium add-on.
Order lead times that respect your season - Lettuce planting windows do not move, so we schedule production around your deadline and confirm shipping dates in writing. Our commercial greenhouse for farming projects follow the same committed schedule.
What we will tell you honestly - If your site needs a different foundation or your wind zone needs a heavier gauge, we flag it before you order rather than after you install. Factory-direct pricing also means the structural warranty covers parts, not just paper. Standards such as EN 13031-1 guide our structural calculations, and growers can cross-check climate guidance published by ISHS or trade reporting from HortiDaily.
Q: What is the lifespan of different types of greenhouses?
A: Up to 3-5 years for film, 20+ years for glass and polycarbonate greenhouses. Film covers require replacement every 3-5 years, while the galvanized steel frame lasts over 20 years. Glass and PC panels offer longer service life with minimal maintenance, making them ideal for permanent installations. Our greenhouse frames use hot-dip galvanized steel pipes with a double-sided zinc coating of 200-275 g/m², providing uniform, dense, and strongly adherent protection specifically engineered for high-humidity greenhouse environments and long-term corrosion resistance.
Q: How long does it take to install a commercial greenhouse?
A: Installation typically takes 2-4 weeks depending on project size and complexity. Standard multi-span greenhouses can be erected in 10-20 working days by our experienced technical team at Ziyang Bozong. On-site assembly time varies based on local conditions and project scale, but we provide detailed installation manuals and remote guidance to streamline the process.
Q: Can you customize greenhouse specifications for my farm?
A: Yes, we offer full customization including dimensions, span width, height, covering materials, and ventilation systems. Simply share your crop type, local climate conditions, and growing area requirements, and our engineering team at Ziyang Bozong will design a tailored solution that optimizes your growing environment and maximizes ROI.
Q: What is your warranty policy for greenhouses?
A: Our galvanized steel frame comes with a 5-year warranty against corrosion and structural defects. Film covers include a 3-5 year UV warranty depending on the grade selected, while glass and PC panels are covered by manufacturer warranties. Ziyang Bozong provides technical support and replacement parts throughout the lifespan of your greenhouse.
Q: What is the advantage of a multi-span greenhouse over multiple single-span tunnels for large-scale commercial production?
A: The primary advantage is land utilization efficiency. Multi-span greenhouses eliminate the gaps between individual tunnels—typically 1-2 meters per gap depending on drainage and access requirements—which can represent 10-15% of total land area in large single-span installations. This additional growing area translates directly to higher production capacity within the same land footprint. Beyond land savings, the continuous interior space simplifies equipment movement, reduces travel time for workers and machinery, enables more efficient irrigation system layout, and creates uniform growing conditions across the entire structure—supporting consistent crop quality and simplified management protocols.
How many lettuce beds fit in a single span greenhouse? - With a 9-meter span and standard 1.2-meter beds, you can run five beds across plus an aisle. Your local transplant density and irrigation layout will finalize the number, and we can draw a bed plan before you order.
What film thickness do you recommend for lettuce? - We supply UV-stabilized PE film that matches your light levels. In high-summer regions a shade or cooling system matters more than film thickness; we will tell you which to add.
Can this greenhouse be extended later? - A single span can be built longer by adding bays, or combined side by side. Keep the end frame design flexible at ordering time and extension is straightforward.
How does the 10-year structural warranty work? - The galvanized steel frame is rated for 15-20 years of service and backed by a 10-year structural warranty against corrosion and structural failure, with replacement parts shipped at cost.
Mark Wu, Co-founder & Lead Engineer at Ziyang Bozong Greenhouse. I have spent over a decade designing film greenhouse structures for export markets and have personally supervised installations across Asia, Africa and South America. The grooved channel system on this greenhouse for lettuce comes from field feedback on wind-prone farms, not from a drawing board.
Have you grown lettuce under a Ziyang Bozong greenhouse? Leave a review and share your bed layout and harvest results - it helps other growers decide.
