One effective method is to apply top-dressing fertilizer throughout the growing season. For one-year-old walnut trees, it's recommended to fertilize 3-4 times annually—specifically in late March, mid-May, and early July. Each time, apply 0.5 kg of compound fertilizer around the root zone, using a ring-shaped trench outside the trunk. In November and December, add a base fertilizer by digging a 10 kg hole filled with well-decomposed farmyard manure. This ensures a steady supply of nutrients for the tree during dormancy.
The second key practice is timely pest and disease management. Young walnut trees are more vulnerable, and once infested, problems can spread quickly. It’s important to identify specific pests or diseases and apply appropriate treatments as soon as they appear. Regular monitoring and early intervention are essential to prevent serious damage.
The third step involves regular weeding and soil loosening. Young walnut orchards tend to have a lot of weeds, which compete for water and nutrients. Weeding should be done at least twice a year. However, avoid using glyphosate or other strong herbicides, as they can negatively affect the health of the walnut trees. Instead, use manual removal or organic methods to keep the area clean and promote healthy growth.
The fourth practice is proper pruning. Pruning should be done according to the tree’s natural growth pattern. After the leaves emerge in spring, focus on removing thin, crowded, or diseased branches before the tree goes dormant (mid-September to mid-October). For fruiting branches, trim them back to main scaffold branches to help shape the canopy. Proper pruning not only improves air circulation and light penetration but also encourages earlier fruiting and higher yields.
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