Black Spot Problems...

Black Spot fungus is one of the most common diseases of roses throughout the world. It will cause a general weakening of the plant so that fewer and fewer blooms are formed and the plant will be increasingly subject to winter injury. The fungus appears as a black spot on the upper leaf surface.

These spots can be as big as 1/2" in diameter and the leaf will yellow and eventually drop off. The black spot consists of tiny black spore producing bodies. These spores may even infect the rose canes. Black spot can survive Canadian winters in fallen leaves and at infection sites on the canes.

Black Spot Solutions