The Gardener's Almanac

Black Spot

This common fungal disease that can affect many fruit, flowers and vegetables, it appears as distinct black, dark grey or dark brown spots, up to 12mm (½”) in diameter on the leaves.

There may be many small spots or just a few large spots.

Affected leaves turn yellow and drop off, and in severe cases, the plant may be completely defoliated.

The disease over-winters on fallen leaves.

There are treatments reputed to eliminate this problem but the best cure is prevention.

This is done by clearing away all fallen leaves (affected or otherwise).

Related Links

Fungicide