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USA High Tunnel for Lettuce Growing
A high tunnel for lettuce is ideal in regions where heavy rainfall physically damages outer leaves and contaminates the product with splashed soil. Overhead protection keeps lettuce clean and commercially presentable without intensive post-harvest washing. It also protects from hail and wind, the two main physical damage sources for field lettuce.
Technical Specs
Ideal Temperature
57 to 68 °F
Relative Humidity
60 to 75%
Crop Cycle
35 to 55 days
Yield vs Field
2 to 4×
Clean product, less washing
Overhead cover eliminates soil splash that stains outer leaves, reducing post-harvest labor and leaf waste at packing.
Hail and wind protection
Hail can destroy a lettuce crop in minutes, a high tunnel eliminates that risk that can wipe out an entire harvest in a single weather event.
Cooler microclimate in summer
Diffuse plastic reduces direct radiation by up to 30%, lowering internal temperature and reducing heat stress that triggers premature bolting.
Agronomist Tip
Use high-diffusion plastic (60%+ diffusion factor) in lettuce high tunnels in warm climates, lettuce is a short-day crop and direct high-intensity light triggers early bolting regardless of temperature.
Other crops in High Tunnel
See all High Tunnel crops →Ready to grow Lettuce in a high tunnel?
Our team will help you design the right structure for your farm, no cost, no commitment.