Black spot is a serious fungal disease in which ... being able to germinate on the leaves. You can also use neem oil, which coats roses in a protective film. This makes it difficult for ...

Some gardeners have also had luck with pure neem oil. Rose bushes' susceptibility to black spot fungus is also one of the ...

and miniature roses are more vulnerable to infection. Fungicides can easily treat black spot disease. Neem oil can also be used to control the spread of the disease.

While black spot is unlikely to kill roses outright, if left untreated ... but prevent them from being able to germinate on the leaves. Neem oil was also suggested as it coats roses in a ...