Commonly affects Roses,the fungi causes brown, black or purple spots with fringed edges to form on the leaves. Over time leaves will yellow and drop off. Can be distinguished from other leaf spot disease by the fringed edges and dark colour.
The fungus thrives in humid conditions. Reduce likelihood of black spot becoming a problem by increasing airflow around plants (by pruning, weeding, not crowding plants), and by avoiding wetting the stem when you water.
Spray ornamentals and roses with Combat 3-in-1 for Roses.
Spray plants with Liquid copper over winter to help protect the plant. Pick off affected leaves, and sweep up and take away affected foliage from around the plant.
In severe cases treating with Super Sulphur may be more effective.
For use on fruit trees, vegetables and roses. No withholding period. No leaf burn. BioGro(R) Certified Organic for use in organic gardening.
There are Plant Doctors in every Kings store all weekend, but you can also book a mid-week consultation. Bring in a photo and we’ll prescribe a solution on the spot!
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