Symptoms of fungal leaf spot include tiny black spots on the foliage of infected plants that increase in size and merge with other spots, forming irregular blotches and patches.
18+ Black Currant Leaves Turning Brown. There seems to be two problems, from what i see. Blackness of leaves often results from an overdose of salts in the soil.
Black Currant Bush Leaves Are Yellowing Ask An Expert from ask.extension.org
Succulent leaves turning brown, yellow or black? Large numbers of minute fungal spores form. If your tree has been prolific prior to this problem, and has a good solid root structure, it will probably regenerate foliage over time once it is consistently receiving enough water.
Once known as the forbidden fruit, black currants are a powerhouse of vitamins.
If too many leaves are falling off, if many leaves turn brown at once, or if the upper leaves start browning your plant might be experiencing too little humidity might also cause black spots to form on leaves. Although the plant is grown for its small black berries, black currant is also highly valued for the leaves, which are said to have great value as a medicinal herb. Brown wrinkly leaves most often indicate too little water at some point. Sometimes i leave the compote as it is, sometimes i press it through a sieve to remove the skins and pips.
