Shucai large grid left the hole to cool down and increase production
August 17 12:04:15, 2025
In the shed area of Nancun Town, Pingdu City, Shandong Province, a unique architectural feature can be seen on nearly every greenhouse: small holes are drilled into the back wall. This design has become a defining characteristic of the local greenhouse structures. These openings are typically positioned about one meter above the ground, spaced roughly every three meters, and each has a diameter of around 20 centimeters. A single-acre greenhouse may have over 20 such holes on its rear wall.
Local vegetable farmers explain that these holes might seem insignificant at first glance, but they serve an important purpose, especially during the hot summer months. While traditional roof vents and side windows are often opened to improve airflow, they don’t always provide enough cooling when temperatures soar. Although shade nets can help lower the temperature, they also reduce light transmission, which is crucial for plant growth. In contrast, the ventilation holes in the back wall allow for efficient air circulation without compromising light levels.
Farmers report that during the hottest days, opening both the front and back wall vents creates a natural cross-ventilation effect, rapidly lowering the internal temperature of the greenhouse. This helps protect crops from heat stress and ensures better growing conditions. It’s a simple yet effective solution that many growers have come to rely on.
Sometimes, the most practical solutions are the ones that go unnoticed. When constructing a new greenhouse, it’s worth considering adding a few strategic holes on the back wall. You might be surprised by how much difference it makes in maintaining a comfortable and productive growing environment.