Winter and spring cucumbers are highly sensitive to weather changes, especially during harsh winter conditions. Poor management under unfavorable weather can lead to sudden wilting and even plant death, resulting in significant economic losses for farmers. Common Causes of Sudden Wilting in Winter Greenhouse Cucumbers 1. Prolonged cold temperatures caused by heavy snowfall can severely impact the growth of young cucumber plants. If the greenhouse lacks proper insulation, the seedlings may suffer from frost damage, especially when the ground temperature remains low for an extended period. 2. Excessive use of fertilizers in the base soil can lead to high salt concentration, which harms the root tips. This reduces the plant's ability to absorb water and essential nutrients, making it more vulnerable to stress. 3. After a snowfall, when the sun returns and the greenhouse is suddenly uncovered, the rapid temperature increase can cause excessive transpiration in the leaves. Since the roots are still weak due to the cold, this leads to physiological water loss and wilting. 4. Overwatering or flood irrigation can also cause wilting. When the soil becomes too wet, air circulation is reduced, leading to poor oxygen supply. This creates an environment where toxic substances may form, causing root rot and asphyxiation of the plants. Prevention and Management Strategies 1. Focus on strong seedling development by maintaining proper watering, light, and temperature. Early pest and disease control is essential to ensure healthy growth and resilience. 2. Improve greenhouse insulation, especially before cold spells. Avoid watering during these times, as it can lower soil temperature and further weaken the plants. 3. Reduce the use of fast-acting chemical fertilizers and instead apply organic manure. Use foliar sprays such as potassium dihydrogen Phosphate or specialized plant growth regulators to boost nutrient absorption and overall health. 4. After snow clears, gradually uncover the greenhouse and mist the leaves with warm water (around 20°C) to reduce transpiration. Remove old or damaged leaves to help the plants recover. During the day, allow some ventilation even if it's cloudy, to expose the plants to indirect sunlight. At night, cover the plants with two layers of protective film to maintain warmth and prevent secondary frost damage. Resume normal watering, fertilizing, and spraying once the weather stabilizes to support recovery and disease prevention. 5. About 15–20 days before planting, prepare the soil properly. Ensure the topsoil is deep, loose, and well-drained. Level the soil after watering to create a smooth, firm surface. Drip irrigation is recommended to avoid waterlogging and maintain good soil aeration, promoting healthy root development and reducing the risk of wilting. Industrial Grade Formates,Ammonium Formate,Formic Acid Potassium Salt,Potassium Formate Wuxi Yangshan Biochemical Co.,Ltd. , https://www.yangshanchem.com