Why do the rose buds wither and not bloom for a long time?
This article introduces the reasons for the withering of rose buds and the lack of blooming in green plants and flowers. Let's learn about it together.
Recently, many rose enthusiasts who have seen climbing roses say that their rose buds are few, and not as full as those on the wall.
Some rose enthusiasts also say that the climbing roses they raise do not bloom at all, and there have been no buds for two years. Why is that?
Reasons for the non-blooming or few blooms in roses
The reasons for the few blooms or non-blooming of roses can be simply summarized into the following three points for your reference.
1. Variety reasons: The variety of roses has a significant impact on blooming. Some varieties bloom frequently, while others bloom lazily, such as the very beautiful Janssen.
Although the flowers are very beautiful and can change color, they are often big and green, rarely blooming.
There are also some old-branch blooming rose varieties, which are single-season bloomers. Naturally, except for spring, they will also bloom in other seasons. Moreover, if pruned too heavily in winter, these varieties will bloom few or no flowers in spring. However, these varieties are less commonly planted in China, and rose enthusiasts prefer multi-season blooming varieties.
However, for climbing roses, many enthusiasts still choose single-season blooming varieties because the number of flowers in spring is often very high after winter dormancy. But for rose enthusiasts in the southern regions, single-season climbers are not very suitable for planting, as they won't bloom much in spring and even less in other seasons.
If you accidentally buy a false climbing rose pretending to be a rose, it will be even harder, as it will basically grow wildly all year round and become a green plant. Therefore, when choosing varieties, southern rose enthusiasts should also consider the blooming nature of the variety to avoid wasting cultivation time.
Regarding the characteristics of rose varieties, the book "How to Bloom Roses from Scratch" summarizes some common varieties, which you can refer to.
2. Insufficient lighting
In addition to variety reasons, environmental factors also affect the blooming nature of roses. Especially for enthusiasts with limited space, they often plant roses in relatively shady areas, such as under large trees or in the corners of north walls, where there is little sunlight. This can cause insufficient sunlight for roses, leading to weak growth, and thus few or no flowers.
If the lighting conditions are poor, it is recommended to choose shade-tolerant varieties and ensure at least 4 hours of direct sunlight every day.
3. Improper fertilization
There are often no good improvement methods for non-blooming caused by variety and lighting elements, but if non-blooming or few blooms are caused by one's management, it can be adjusted by changing the cultivation method.
Overuse of nitrogen fertilizer
Many rose enthusiasts, when top-dressing roses, do not distinguish the uses of various fertilizers and apply nitrogen fertilizer excessively. As a result, they find that the leaves of the roses are super large, but there are few flower buds. This is caused by the overgrowth due to excessive nitrogen fertilizer and the insufficient use of phosphorus and potassium fertilizers, leading to small and few flower buds. Adjusting the fertilization strategy in time and focusing on increasing the use of phosphorus and potassium fertilizers can quickly restore the situation.
Lack of calcium and rotting core
Some enthusiasts, eager to see flowers, continuously apply monopotassium phosphate to the roots and leaves. Eventually, they find that the top buds of the roses wither and fall off slowly. This is because excessive phosphorus and potassium fertilizers cause calcium absorption problems in roses, leading to rotting cores and inability to bloom.
In this case, you can cut back the branches, apply nitrogen and calcium fertilizers for correction, and the new buds will bloom again after they grow out.
4. Lack of pruning
Many rose enthusiasts know that roses need to be pruned, but they often can't bring themselves to do it or are reluctant to prune. As a result, the plants become huge in early spring, with few flowers and many withered branches.
In this case, during the growing period, only withered, diseased, and overly old branches should be pruned. Old branches with healthy new growth at the top should be retained, and the flowering branches should be pruned back after flowering. Continue to prune heavily after the leaves fall in winter.
If it is in the southern region, it is first pruned大幅ly from December to January, retaining a few branches with many leaves, and then pulling horizontally to enhance fertilization and water, promoting new growth at the bottom to update the plant.
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