
BioAdvanced All-in-One Rose and Flower Care 32-fl oz 9-14-9 Flower Outdoor Fertilizer
Have been using this product every 6 weeks & now have black spotted leaves. We live in N Florida with lots of rain in summer.
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Thank you for asking! All in One Rose & Flower Care should control diseases for up to 6 weeks. For an active infestation of black spot, I would recommend using 3-in-1 Insect Disease & Mite Control. To be most effective with this product, you will want to make at least 3 applications spaced 7-14 days. Jordan
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