Greenhouse structures and infrastructure form the physical envelope of controlled-environment growing operations. The suppliers in this category provide commercial greenhouse frames, glazing systems, ventilation hardware, benching, and structural components for new builds and facility expansions. When evaluating a greenhouse supplier, start with engineering capability — commercial structures need to meet local wind, snow, and seismic load requirements, and not every supplier provides stamped engineering drawings or works with your local permitting process. Glazing selection (polycarbonate, glass, polyethylene film) involves tradeoffs between light transmission, insulation value, lifespan, and cost that depend on your climate and crop mix. Lead times for structural steel and custom fabrication can stretch to months, so confirm realistic delivery schedules before committing to a project timeline. Look for suppliers that offer turnkey installation or can coordinate with your general contractor, and verify their warranty terms cover both the frame and glazing components. For multi-phase buildouts, evaluate whether the supplier offers volume pricing and design continuity across expansion stages.