Why does the rose scion turn black after grafting (why does the grafted branch turn black)

Why does the scion turn black and rot after grafting?

The scorching of rose leaves may be caused by a variety of reasons, and flower lovers who like to grow roses may encounter this situation.

If this phenomenon only occurs on individual leaves, the other leaves are still very fresh and tender. So we can rule out some possible factors, such as fertilizer damage.

① Fertilizer damage

If the fertilizer concentration is too high, the rose leaves will turn yellow and fall off over time, and slowly the whole plant will die. You can slowly observe and see how these leaves develop.

If it is fertilizer damage, other leaves should also be affected, but they are not shown in your pictures. I think fertilizer damage can be ruled out.

②High temperature burns

Although it is autumn now, some places are still very hot. The temperature in our area was 31 degrees Celsius a few days ago, and the tender leaves of many of my roses were burned.

If your rose is placed in the sun without any shade, you can consider this factor. High temperature burns are generally more serious on the sunny side.

③ Too much or too little watering

Watering too much or too little can cause the leaves to scorch. Watering too much can cause root rot, and then the leaves will have problems and turn yellow and fall off.

If you water too little, the leaves will lack nutrients and water, and will slowly wither from the edges of the leaves . Therefore, we should pay attention to the maintenance of roses, and not water too much or too little.

④Diseases

Roses can also get a disease called wilt , which is a common plant disease. This disease is generally caused by a lack of trace elements.

If the leaves are scorched due to this reason, it means that your potting soil is not properly configured and you need to change the potting soil or add some multi-compound fertilizer.

The above situations are most likely to cause rose leaves to burn. Generally, sun burn and fertilizer damage are more likely to cause this phenomenon.

So you need to check and correct yourself according to the points I mentioned above to find out the reasons. Have you applied fertilizer in the past few days? Or what is the temperature in the past few days? You have no explanation, so you can only think about it and find out the reasons.