Apple trees need to be fertilized in the autumn, and this practice is closely related to their root growth cycles throughout the year. Understanding the three major growth peaks of the root system helps explain why autumn is the optimal time for fertilization.
During the annual growth cycle of apple trees, the root system experiences three distinct periods of vigorous growth. The first peak occurs from mid-March to mid-April, right at the beginning of the growing season. During this time, the roots are actively growing, and the tree begins to show signs of new shoot development. This phase is often referred to as “root growth before shoot growth.†As the shoots grow, the root activity gradually slows down.
The second peak happens between late May and late June. At this stage, the new shoots are still growing, but the root system starts to experience another period of rapid growth. This phase lasts about 35 days and is marked by high nutrient absorption due to favorable temperature and moisture conditions. This period strongly supports the growth of summer shoots, which is crucial for the tree’s overall health and productivity.
The third and most important peak occurs after the growth of new shoots slows down, usually starting around mid-September. At this point, the tree is focused on reproductive growth and has used up a lot of nutrients. This makes it essential to replenish them. The third root growth peak is characterized by longer duration, more fine root development, and greater nutrient absorption. These factors help store enough nutrients for the next growing season, supporting healthy bud break, flowering, fruit setting, and shoot growth in the following spring.
Based on this understanding, it's best to apply fertilizer during autumn and winter to ensure proper nutrient reserves. Early and frequent applications, along with organic fertilizers, are recommended. It's also important to note that fertilizing in spring can be less effective because the roots take time to heal after being disturbed, which may delay nutrient uptake. By contrast, autumn fertilization allows the tree to absorb and store nutrients efficiently before the dormant season.
Additionally, excessive top-dressing in summer can lead to problems like bitter pits in the fruit. Therefore, it's better to focus on base fertilization in autumn rather than relying on quick-acting fertilizers during the growing season. In summary, timing is everything when it comes to fertilizing apple trees, and autumn is the key season for long-term tree health and productivity.
Giant Squid Wings Frozen,Sea Food Frozen Squid Wings,Frozen Giant Squid Wings
Zhoushan Xifeng aquatic co lid. , https://www.xifengaquatic.com