What should I do if my Chinese roses have yellow leaves and become bare stems?
Let me share some knowledge about Chinese roses with yellow leaves and bare stems. The following is a detailed explanation by the editor.
What should I do if my Chinese roses have yellow leaves and become bare stems?
Recently, many rose enthusiasts have said that their roses have developed a lot of yellow leaves and even become bare stems, and they are worried about whether they will die. So what should we do when faced with Chinese roses that have many yellow leaves and become bare stems? First, we need to understand the reasons for the yellowing and shedding of the leaves in large numbers, and then take targeted measures to solve the problem.
Reasons for the yellowing and shedding of Chinese roses
The common reasons for the yellowing of many Chinese roses can be summarized into about 5 types.
1. Seasonal yellowing of leaves
Seasonal yellowing of leaves often occurs during the transition of seasons, such as during the transition from summer to autumn, or autumn to winter. After the temperature drops significantly, Chinese roses quickly show a large area of old leaves turning yellow, which is a seasonal metabolic yellowing of leaves.
Metabolic yellowing of leaves is to adapt to seasonal changes, to make more room for new branches to grow, or to enter a dormant state to conserve energy. If during this period, your potted Chinese roses are well managed in all aspects, but suddenly develop many yellow leaves without obvious black spots or other abnormalities, it can be considered natural metabolism. It seems that autumn is coming early this year, and the weather has become significantly cooler recently.
2. Drought and lack of water
In addition to the impact of seasonal changes, there is another reason, which is yellowing caused by drought. Especially for Chinese roses planted in the ground, due to rough management and not watering for a long time, combined with previous excessive rainfall that may have caused some degree of root suffocation, if watering is not done for a long time after the rain stops, and the roses have some damage to their fine roots, their absorption capacity decreases. With the soil lacking water, it is easy to cause drought, which manifests as a large area of yellow leaves.
What should I do if my Chinese roses have yellow leaves and become bare stems?
If you find that Chinese roses have a large area of yellow leaves and the soil is relatively dry, you must water them in time, which is usually caused by drought. If it is a shrub Chinese rose and the leaves have fallen off completely, you can directly prune half of the branches, so that the new buds that grow will be stronger.
If it is a climbing Chinese rose, and the leaves have fallen off now, new buds will bloom immediately and the number of flowers will also be large. However, it is recommended to apply additional fertilizer in time because flowering consumes a lot of energy. If additional fertilizer is not applied in time, it will affect the growth of the Chinese roses and the number of flowers next year.
3. Severe black spot disease
There is another situation that causes a lot of leaves to fall off Chinese roses, which is severe black spot disease. Especially if it has rained a lot recently and the application of fungicides was not timely, black spot disease may break out, causing a lot of leaves to fall off.
If black spot disease has already broken out and there are few leaves left on the Chinese roses, you might as well prune once and cut the branches of the Chinese roses to half their height. After pruning potted Chinese roses, it is necessary to control the water, as fewer leaves consume less water, and excessive watering can easily cause root suffocation. Watering should follow the principle of watering thoroughly when dry.
After pruning, clean up the fallen leaves in the pot and around the roots, then spray the entire plant with a fungicide for comprehensive disinfection. After that, apply a long-acting fermented organic fertilizer or controlled-release fertilizer to the Chinese roses.