In the spring, in addition to other pleasant and unpleasant surprises at the dacha, it turns out that the roses covered for the winter have for some reason turned black.
It is impossible to immediately say that the plant has frozen, because there are plenty of reasons for such metamorphoses. We will tell you what happened to the rose garden and whether it can be cured.
Frosts
This is not the worst thing that could happen. If the shelter was unreliable or installed later than the due date, and the autumn and winter were cold, then it is quite possible that it was the bad weather that left its mark on the stems. In this case, the bush will recover, and on its own.
Rotting or decay
Again, the shelter is to blame, which may not have been made of the most suitable material, or the bushes were covered too tightly. Due to the resulting condensation, the bushes may begin to rot. The same thing will happen if melt water stagnates on the site in early spring.
Infectious burn
This is serious. The disease is also known as stem cancer. The reason is not frost and insulation, but care of roses. The only weather exception is wintering in conditions of frequent thaws. There is no treatment for this disease yet. Therefore, it is so important not to miss the moment when roses need to be uncovered after winter, and then completely remove the cover. They start after the snow melts, and the night temperature remains within -5 degrees Celsius.
How to save roses
You can't do without pruning. If it's not stem cancer (its signs are dark spots bordered by reddish-brown color that cover the shoots and form deep wounds), then the bushes can be pruned. If it's a disease, then the only thing left to do is burn the bush.
The remaining healthy bushes are treated with a 1% solution of copper sulfate.
In other cases, shoots are cut to living tissue, sanitary and formative pruning is performed, and complex fertilizers are applied.
