Why do the buds of the Chinese rose fall off when touched?
The editor brings you some green plant maintenance tips for the Chinese rose buds that fall off when touched, and the following is a comprehensive introduction.
During this period, Chinese roses are in a rapid growth phase. In warmer regions, many Chinese roses have already formed flower buds. However, the corresponding problems have also emerged. Some friends have encountered the issue of bud drop. The small flower buds fall off when touched and cannot grow, let alone bloom. So, what causes this?
Reasons for the bud drop of Chinese roses
The reasons for the bud drop of Chinese roses can be summarized into the following four.
1. Excessive nitrogen fertilizer
In spring, when Chinese roses grow rapidly, many flower enthusiasts worry about insufficient fertilization and apply fast-acting nitrogen fertilizers. Nitrogen promotes leaf growth, while phosphorus promotes flowering. Nitrogen fertilizers mainly encourage the growth of branches and leaves in Chinese roses. If excessive nitrogen fertilizer is applied to Chinese roses, it can easily cause the plants not to form flower buds or easily drop the buds after they form, leading to the phenomenon of bud drop.
Therefore, when top-dressing Chinese roses, try to use balanced growth fertilizers during the growing period and switch to fertilizers with high phosphorus and potassium content after the buds appear, to promote bud growth. Do not use a large amount of nitrogen fertilizers after the Chinese roses have formed flower buds, as it can easily lead to bud drop.
2. Excessive phosphorus and potassium fertilizers in the early stage
Too much nitrogen fertilizer can cause bud drop in Chinese roses, and excessive phosphorus and potassium fertilizers can also cause the same phenomenon.
Many flower enthusiasts are eager to see their Chinese roses bloom and want the plants to form buds early. They may insist on using phosphorus and potassium fertilizers, such as potassium dihydrogen phosphate, right after the plants sprout. However, during the growth period of Chinese roses, more nitrogen fertilizers are needed. If a large amount of phosphorus and potassium fertilizers are applied while nitrogen is reduced, it can lead to excessive phosphorus and potassium, resulting in poor absorption of calcium by the plants and causing rot in the core.
Severe cases can lead to the rotting of the top core of the branches, blind buds, and sometimes bud drop after the buds form.
Are you now thinking that fertilizing is too difficult?
Actually, as long as you pay attention to using a variety of fertilizers and do not overuse one type, achieving balanced nutrition will not easily lead to problems caused by excessive use of a single fertilizer.
3. Severe lack of sunlight
Using a single fertilizer can easily cause bud drop in Chinese roses, and a lack of fertilization and sunlight for an extended period can also lead to bud drop. Chinese roses are plants that love sunlight. If they encounter long periods of cloudy and rainy weather during the bud formation stage and are severely lacking in sunlight, they may easily show symptoms of malnutrition due to insufficient photosynthesis, resulting in bud drop.
If there are consecutive days of cloudy and rainy weather, it is best to apply phosphorus and potassium fertilizers through foliar spraying to promote the strengthening of the Chinese rose plants and their metabolism.
4. Malnutrition
Sometimes, if there are too many buds on a Chinese rose or if the blooming period is too long, the smaller buds may easily wither and fall off. This is mainly due to insufficient nutrients. The larger buds consume a lot of nutrients and water. If top-dressing is not timely, it can easily lead to insufficient nutrients, causing the Chinese rose to automatically abandon the smaller buds. This is a self-selection process of the Chinese rose, and what we can do is to try to keep the nutrients and water sufficient or appropriately thin out the buds.
The above[] introduces the detailed content about why the buds of Chinese roses fall off when touched. I hope it can be of help to you!