Seedlings and weak seedlings grown in greenhouses are not well equipped to handle cold weather. To protect them, it's advisable to cover them with a layer of temporary shelters or structures. This double-layer protection can significantly reduce the risk of frost damage and help maintain a stable temperature around the plants.
Another effective method is to use straw curtains or grass mats. These can be placed over the greenhouse at night and rolled up during the day. They help retain heat inside the structure, prevent frost from forming on the plastic covering, and provide an extra layer of insulation for the crops.
Watering the soil before a frost event can also be beneficial. Since water has a high heat capacity, it absorbs and retains warmth, which helps keep the air and soil temperature in the greenhouse more stable. This technique ensures that the fruit and vegetable seedlings remain protected even when outdoor temperatures drop significantly.
If the greenhouse is small, placing containers of hot water inside before a cold snap can provide additional warmth. As the water cools down, it releases heat gradually, helping to raise the internal temperature and offering some protection against freezing conditions.
On nights when frost is expected, burning materials like straw or wood near the greenhouse can generate smoke, which creates a thermal blanket effect. This method helps trap heat and slightly raises the temperature around the greenhouse, further protecting the delicate plants inside.
By combining these methods—using protective covers, watering before frost, adding heat sources, and creating smoke barriers—farmers can effectively safeguard their seedlings and ensure better survival rates during cold weather. These strategies are especially important for young or vulnerable plants that lack the resilience to withstand sudden temperature drops.
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