Why Black Spots Appear on Rose Leaves and How to Get Rid of Them

Black round spots with uneven edges most often indicate a fungal disease — black spot. It develops especially quickly in rainy weather, with sharp temperature fluctuations and thickened plantings where the leaves remain wet for a long time.

What to pay attention to

First small dark spots appear on the lower leaves. Later they increase, the leaves turn yellow, dry and fall prematurely. If nothing is done, the fungus rises higher, weakening the entire bush.

How to save the roses

• Immediately pick off all affected leaves — both on the bush and those lying under it. Do not leave them on the flowerbed and do not put them in the compost.
• Water only at the root. Drops of water on the leaves create favourable conditions for the development of the fungus.
• If the bush is very dense, carry out light thinning. Good air circulation significantly reduces the risk of re-infection.
• For treatment use a fungicide intended for fighting fungal diseases of roses. The treatment should be repeated after 7–10 days if the preparation instructions require it.

How to prevent the appearance of spots

• Regularly remove fallen leaves.
• Do not overfeed the roses with nitrogen fertilizers at the end of summer — overly tender young shoots are more vulnerable to diseases.
• In spring and after prolonged rains carry out preventive treatments, especially if the problem has already arisen in previous years.
• Make sure that the bushes do not grow too densely next to each other.

Roses always hint when they need help. It is enough to remove the diseased leaves in time, provide proper care and not put off treatment — then the bushes will quickly recover and will continue to delight with abundant flowering for a long time.

This material was prepared by the editorial team using artificial intelligence tools. All information has been verified and edited before publication.