Hi! My geranium stems are slowly turning black. Most of this can be seen as starting from the top of the stem and not from the root. Is this blackleg disease? is it the same as root rot? Some parts of the stem are not completely black but have black holes and if I cut that part the inside of the stem is completely black. A photo is attached.
If anyone knows what this is, can this be treated? I was given 2 solutions to dilute in water and spay the plant and the soil. Will that work? I would appreciate anyone's help. Thank you