How to Manage the Production of Greenhouse Tomatoes in Winter
July 30 10:23:01, 2025
Planting tomatoes can be a profitable venture for farmers, and effective management during the growth period is essential to achieving high yields and efficiency. Proper care throughout the growing cycle includes tasks such as weeding, soil cultivation, vine training, pruning, removing old leaves, ensuring proper ventilation and light exposure, and controlling pests and diseases. Among the common tomato diseases are viral infections, bacterial wilt, early blight, and late blight. Common pests include cotton bollworms and aphids. Preventive measures are crucial in managing these issues. For viral diseases, it's important to use resistant varieties, disinfect seeds, manage seedlings carefully, control aphid populations, and plant at the right time. Temperature control is also key—during the day, greenhouse temperatures should be kept around 25°C, while at night they should remain between 10–13°C. Ventilation should start gradually, increasing over time, and then be reduced or closed as temperatures drop in the afternoon.
In addition to disease and temperature management, proper fertilization and irrigation are vital. During summer and autumn rainy seasons, watering is generally not needed unless the second or third fruits show signs of drying. At that time, moderate watering is recommended. Fertilization should be timely to support fruit development, flower protection, and fruit preservation. Using microbial fertilizers like Golden Baby Microbial Fertilizer as a base, along with top dressings such as Gold Seedling Root Strong or Seedling Strong, can enhance fruit quality. Spraying Golden Baby Sweetening Spirit can improve the appearance and sweetness of the fruits. If some greenhouses show nutrient deficiencies, applying Jinbao Nutrient Supplements can boost plant vitality and promote growth.
Harvesting tomatoes at the right time is equally important. Tomatoes go through four stages: green, color change, mature, and fully ripe. For storage, harvesting during the green stage is suitable. For transport, picking when about one-third of the fruit turns red is ideal. For local sales or personal consumption, it's best to harvest when more than one-third of the fruit is red. Harvesting should be done gently to avoid damaging the fruits. It’s recommended to remove the fruit stem to prevent bruising during transport. Before the first frost, any remaining unripe green tomatoes should be picked and stored in the greenhouse until they ripen, which helps extend the supply period and increase profits. Avoid using hormones to speed up coloring, as this can affect fruit quality and consumer safety. Proper selection, packing, and selling ensure better economic returns and higher-quality produce.