The black spots are probably caused by fungal spores that have been splashed up from the soil by heavy rain. The best way to deal with the black spots and reduce the risk of further infections is to cut off the infected leaves, and also any leaves close to the ground. The risk is you've the fungus in the soil so it may become a recurring problem. You can use copper fungicide, or neem oil on the plant early in the season.
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The black spots are probably caused by fungal spores that have been splashed up from the soil by heavy rain. The best way to deal with the black spots and reduce the risk of further infections is to cut off the infected leaves, and also any leaves close to the ground. The risk is you've the fungus in the soil so it may become a recurring problem. You can use copper fungicide, or neem oil on the plant early in the season.
Thank you very much Tim. That is really useful and I will try this and hope it works.
thank you
Sandra