21/08/2025
Snow in Greenhouses: An Agronomist Reveals 2 Surprising Benefits for Winter Soil Preparation
As winter sets in, many greenhouse growers debate whether to add snow to their protected growing spaces. While some believe it insulates the soil, agronomist Mikhail Vorobyev clarifies that snow serves two more critical purposes:
1. Natural Pest Control
Contrary to popular belief, snow does not warm greenhouse soil—instead, it helps eliminate pests. Vorobyev explains:
Many insect larvae and pathogens overwinter in the soil.
Adding snow only after the ground partially freezes ensures pests are exposed to lethal temperatures.
Research shows that freeze-thaw cycles reduce soil-borne pests by up to 70% (Journal of Applied Entomology, 2024).
Key Tip:
Timing matters—introduce snow in mid-winter when the soil is cold enough to kill pests but before deep frost sets in.
2. Slow-Release Soil Moisture from Meltwater
As spring approaches, melting snow provides gradual, natural irrigation:
T meltwater is rich in oxygen and minerals, making it superior to tap water for seedlings.
Studies confirm that plants watered with meltwater show 15-20% faster early growth (Agronomy Journal, 2023).
Snowmelt prevents dry soil crusting, ensuring better seed germination.
Practical Advice:
Use snow from greenhouse roofs—no need to haul it from elsewhere.
Avoid compacting snow layers to allow even melting.
Debunking the Insulation Myth
Vorobyev dismisses the idea that snow warms greenhouse soil:
Snow’s insulating effect is minimal in greenhouses since temperatures are already regulated.
Soil temperature data shows no significant difference between snow-covered and bare greenhouse beds (USDA Cold Climate Agriculture Report, 2025).
Shoveling snow into greenhouses isn’t about warmth—it’s a strategic tool for pest management and spring soil preparation. By following Vorobyev’s recommendations—applying snow in mid-winter on pre-chilled soil—growers can naturally reduce pests and ensure optimal moisture for early planting.
