A light-colored ring may appear around the spots when they are older. The spot goes all the way through the leaf, and is most visible on the bottom of the leaf. Often, several nearby spots will grow together. When this happens on young leaves, the tissue between the spots tears as the leaf grows. Spots on the petioles and stems are dark brown to black and oval to elongated.
Spots can appear on all aboveground parts of the plant, except the petals.
Bacterial spot symptoms on leaves are greatly affected by moisture levels. The upper surface may be somewhat greasy and translucent, with a black margin. The center, translucent tissue will soon dry and will appear very thin. It may crack. The spots will often be more numerous on younger leaves and may occur on only one or two leaflets on any given leaf.