After the tomato plant enters its fruiting stage, it becomes more susceptible to a condition known as "blue skin," which can occur due to adverse weather conditions such as low temperatures and insufficient light, or improper fertilization, particularly excessive use of nitrogen. To prevent this issue, the following measures are recommended:
First, extend the period during which the plants are observed for early signs of problems. Regular monitoring helps detect issues before they become severe. Second, balance the fertilizer application by increasing the amounts of phosphorus and potassium while reducing excessive nitrogen. This helps improve fruit quality and overall plant health. Third, strengthen the root system to enhance the plant's resistance to stress. Using foliar fertilizers that contain essential micronutrients like boron, calcium, magnesium, iron, and zinc can be beneficial. Among these, amino acid-based foliar sprays are especially effective, as they promote dark green foliage, boost photosynthesis, and improve the uptake of key nutrients like boron and calcium.
Fourth, apply foliar sprays such as Harvest No. 1, Green Wind 95, or chitin-based leaf fertilizers to support plant growth and fruit development. Fifth, manage the number of fruits set on each plant carefully—avoid overloading the plant with too many fruits or setting them too low on the stem, as this can weaken the plant and lead to poor fruit quality. Lastly, control the concentration of flower hormones used during pollination, ensuring they are not too high. Timely application of additional nutrients after the anther stage is also important to maintain healthy growth and fruit development.
By implementing these strategies, gardeners and farmers can significantly reduce the risk of blue skin and other related issues, leading to healthier plants and better-quality tomatoes.
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