Posted: 27/06/2014 at 15:54
Pick off the leaves which are infected and burn them. If you leave them on the fungus just spreads and treat immediately with a fungicide. Keep it well watered and fed, this reduces the chances of the black spot returning and keep an eye on it. Black spot can remain in the soil so spray the soil around the plant and pick up any fallen leaves and burn them too. Hygiene around the rose is also important as well as a good flow of air, a mulch of compost or farmyard manure will help retain moisture, but after spraying. A well fed and watered rose is less susceptible to rose diseases and more able to fight off any passing fungus. And watch out for aphids which can transmit disease.
Good rose care is essential for flower production and longevity.
And even if you are a novice mollimay, no question here is ever stupid everyone here will always help no matter what the problem.