Foliar fertilization is an effective technique for grape cultivation, where a liquid fertilizer is sprayed directly onto the leaves, shoots, and young fruits. This method is most beneficial when applied during the early growth stages and can be continued throughout the growing season, especially after summer. For best results, it's recommended to spray in the evening on windless and dry days, or between 8 AM and 10 AM. Apply the foliar fertilizer every 10 to 15 days, repeating this process 2 to 4 times depending on the plant’s needs.
About 10 days after the initial application, you should re-fertilize, especially when the fruit reaches the size of a green bean. At this stage, apply 500 grams of compound fertilizer per planting hole, and water immediately after application. This step is crucial for promoting healthy fruit development and shoot growth, so it’s important to apply it at the right time.
After harvesting, it's essential to replenish the vineyard with nitrogen to maintain leaf function, extend leaf lifespan, and improve nutrient storage in the tree. Two effective methods are foliar spraying and root application. Spraying a 0.4% urea solution is highly effective, using approximately 4 kg of urea per 667 square meters. Alternatively, applying nitrogen directly to the roots after harvest also yields good results. Both approaches help strengthen the vine and prepare it for the next growing season.
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