Autumn rose pruning
move from the blossom to the entire rose plant, affecting the buds that have not yet opened (if there are), leaves, and stems. Accordingly, forming spores, the disease hibernates together with the rose and damages the plant even more next season.
To prevent the spread of rose diseases, prune and snip off the petals that have faded and become wet or frozen but remained on the rose. This especially applies to tea-hybrid and florist varieties whose flowers are densely packed with petals and varieties that are naturally poorly cleaned off their petals.
In no case should you simply throw the petals down under the plant, as this will simply transfer the diseases to winter on the ground
Sometimes during the early autumn there are spring frosts that damage not only the opened flowers, but sometimes also the buds and newly formed rose hips. This especially applies to varieties with weak winter resistance. Even if we leave the rosehip to restrain the autumn’s growth trying by this to send a signal to the rose that it should stop actively growing, the frozen rosehip will not be sending any signals. Their tissues are already damaged by the frost, it does not receive any nutrition, and does not restrain the active growth in autumn, that some are afraid of so much.
In such cases, the frosts themselves and the days which are getting shorter, have already signaled to the rose that it is time to prepare for winter. And frozen, young and unformed fruits become only a breeding ground for fungal diseases. Therefore, they should also be pruned and removed from the plants. It is best to remove the petals from the plant and dispose of them properly. This will help keep your garden healthy and disease-free.