High Tunnel vs. Macrotunnel vs. Commercial Greenhouse: Which One Is Right for Your Farm?
Not sure what structure your farm actually needs? Here's a straightforward breakdown of high tunnels, macrotunnels and commercial greenhouses, what each one does, who it's for, and how to choose.
Walk into any farm conference in the U.S. right now and you’ll hear growers using “high tunnel,” “macrotunnel,” and “greenhouse” almost interchangeably. They’re not the same thing, and picking the wrong structure can cost you serious money, not because any of them are bad, but because each one is built for a specific purpose.
This article breaks down the real differences so you can make a decision based on your farm, your crop, and your goals.
Start With the Question That Actually Matters
Before comparing structures, ask yourself one thing: what problem are you trying to solve?
Are you trying to protect berries from rain and get three extra weeks of harvest? Are you trying to grow tomatoes twelve months a year? Are you dealing with extreme weather that’s cutting into your yields every season?
The answer tells you which direction to go before you even look at specs.
What Is a High Tunnel?
A high tunnel is the simplest structure in the family. It’s a metal frame covered with polyethylene plastic film, typically tall enough to walk through and work in. You can ventilate it by rolling up the sides or opening the ends.
High tunnels are excellent for season extension. They don’t require a heating system (though you can add one), and installation is straightforward enough that many operations put them up without outside help. They’re also the structure most commonly covered by NRCS grant programs, which is a big reason they’ve taken off in the U.S. over the last decade.
What they’re not great at is precision climate control. If you need to hit a specific temperature range year-round, a high tunnel will struggle in extreme cold or heat without significant additional investment.
Good fit for: Berry production, cool-season vegetables, cut flowers, small operations testing protected agriculture for the first time.
What Is a Macrotunnel?
Think of a macrotunnel as a high tunnel’s lower-profile cousin. The structure is arched rather than peaked, sits closer to the ground, and is generally used for row crops in the field rather than as a walk-in workspace.
What macrotunnels do exceptionally well is protect individual rows or beds from rain, hail, excessive UV, and temperature swings. Strawberry growers have adopted them widely because they extend the harvest window without the overhead of a full greenhouse operation.
They’re also one of the most cost-effective ways to start with protected agriculture. The investment is lower than a commercial greenhouse, installation is fast, and you can expand incrementally as your operation grows.
If you’re growing berries or certain vegetables and your primary goal is crop protection and season extension rather than year-round production, macrotunnels often deliver the best return on investment of any structure in this category.
Good fit for: Strawberries, blueberries, raspberries, small vegetables. Farms looking for strong ROI without a major capital commitment.
What Is a Commercial Greenhouse?
A commercial greenhouse is in a different category entirely. We’re talking about a permanent structure engineered for controlled-environment agriculture. That means managing temperature, humidity, CO2 levels, light, and irrigation all within a closed or semi-closed system.
The crops grown in commercial greenhouses don’t just have a longer season, they produce year-round, at yields that field farming can’t come close to. Tomato yields in a well-managed greenhouse can be ten times what you’d get from the same area in an open field. That math changes what’s financially possible for a farming operation.
The tradeoff is that you’re committing to a real infrastructure project. A commercial greenhouse requires engineering, site preparation, a heating and cooling strategy, irrigation design, and trained management. It’s not something you prototype, you build it to scale and run it as a business.
Good fit for: Tomatoes, cucumbers, peppers, leafy greens, herbs, flowers. Operations with clear market access (retail contracts, food service, direct-to-consumer) and the management capacity to run a controlled-environment system.
How to Choose
Here’s a simple way to think about it.
If your goal is to protect an existing field crop and extend its season by a few weeks or months, start with macrotunnels. They’re proven, they pay for themselves fast, and they don’t require a major operational shift.
If you want to get into protected agriculture and are testing the market before a larger commitment, a high tunnel gives you that flexibility. It’s also the best fit if you’re applying for NRCS funding, since the program is structured around high tunnel production.
If you’ve identified a year-round crop market and have the infrastructure and management team to run a full controlled-environment operation, a commercial greenhouse is the right move. The investment is larger, but so is the production capacity and the income potential.
Many farms actually use all three. Macrotunnels on the berry rows, a high tunnel for early-season transplant starts, and a commercial greenhouse for the tomato and cucumber operation. They solve different problems.
One More Thing Worth Knowing
The structure is only part of what makes protected agriculture work. Irrigation, covering material, ventilation design, and the technical support behind the product matter just as much as the frame.
We’ve been building and installing these structures across Latin America for over 30 years, and we’ve seen operations succeed or struggle based on how well everything was matched to the specific farm conditions. Before you decide, it’s worth talking to someone who has actually done it in your crop and climate.
If you’re ready to figure out which structure fits your operation, reach out to our team. We’ll ask you the right questions and point you in the right direction without the sales pressure.