What is going on with the black stem of the rose cutting
If you want to know about the phenomenon of the black stem in rose cuttings and the reasons and remedies for rose black stems in the context of flower cultivation experience, the following is an introduction for you.
The main method of propagation for roses is cutting, and the threshold for cutting is also very low. As long as you want to propagate new roses, you can cut a section of the stem for cutting. There are two methods of rose cutting, one is using solid substrates like soil, and the other is using water. Many gardening enthusiasts prefer water cutting because it allows for the observation of root growth at any time, and there is no need to worry about overwatering or underwatering affecting root growth. However, there is a problem with water cutting: after the rose cuttings have rooted and are transplanted into the soil, they are prone to transplantation failure and exhibit black stem and withering symptoms, ruining the cutting work. Why does the black stem occur after rose cuttings rooted in water are transplanted? How can we prevent black stems in roses that have already rooted in water? Let's discuss my views on this.
Rose
Why does the black stem occur after rose cuttings rooted in water are transplanted?
The roots that grow from rose cuttings in water are hydroponic roots, which are only suitable for an aquatic environment. They are very tender, have a high water content, and almost no outer tissue. When the roses rooted in water are transplanted into the soil, the hydroponic roots cannot adapt to the soil environment for a while and do not grow soil roots, which makes it difficult to absorb water and resist bacterial attacks in the soil. They easily rot, leading to black stem symptoms and transplantation failure.
Roots unable to adapt to the soil environment and result in black stem and withering
Is there any salvation after the black stem occurs?
There is no way to save the roses that have developed a black stem after water cutting. If you dig them up to check, you will find that the original hydroponic roots have all rotted. Even if it's not water cutting but soil cutting, the black stem after transplantation is also a sign of withering and cannot be saved. Therefore, when transplanting roses, you need to be careful, as success is near, and if the final step is not handled well, all previous efforts are wasted.
The tissue of the black-stemmed roses has necrotized and cannot be saved
How to prevent black stems in roses that have already rooted in water?
1. Do not transplant too late
To improve the survival rate of roses transplanted from water cuttings, it is necessary to transplant earlier. When the hydroponic roots are about 2 to 3 centimeters long, transplant them, and do not wait until the roots are too long. The longer the roots, the lower the survival rate of transplantation. The reason is that the longer the roots, the stronger the dependence on the aquatic environment. When the hydroponic roots are small, they are more active and adapt quickly to the soil environment, thus improving the survival rate.
What is going on with the black stem of the rose cutting
Overlong hydroponic roots are prone to black stem
2. The soil for planting should be loose and well-ventilated
When transplanting roses from water cuttings, the soil for planting must be loose and well-ventilated. On one hand, soil with good looseness and ventilation contains more oxygen, making it less likely for hydroponic roots to rot. On the other hand, such soil can retain more water, keeping the soil relatively moist (the higher the moisture content, the more conducive to hydroponic root growth), preventing the roots from aging or rotting rapidly due to insufficient water supply.
Soil that is not loose and well-ventilated is prone to black stem
3. Place in a shaded and well-ventilated area after transplanting
Newly transplanted rose cuttings must be placed in a shaded and well-ventilated area to wait for the roots to establish. Do not place them in areas with diffused light or semi-shade. The reason is that when hydroponic roots first come into contact with soil, their water absorption capacity is almost zero. In a shaded and well-ventilated area, the evaporation of water is low, so it is less likely for the leaves to wilt due to water deficiency. If placed in areas with diffused light or semi-shade, the evaporation of water is greater, making it easy for new leaves to lose water and wilt. If the roses are planted in the ground, they should be shaded after planting and the shading materials should be gradually removed after full recovery.
Shade and ventilation are important after transplanting
4. Spray the leaves more
Since the newly transplanted rose cuttings cannot adapt to the soil environment and have weak water absorption, it is necessary to spray the leaves and the surrounding area more to reduce the burden on the roots and allow them to adapt. Especially in the first three days after transplanting, it is necessary to spray water at least three times a day, otherwise, even if the plant survives, the new buds and leaves are easily damaged.