Hoya Kerri disease
My sweetheart Hoya is not looking so good. The disease appears to be moving upwards from the roots since the top of the plant looks fine. The leaves will spot then turn yellow and fall off. I've owned this plant for a couple years and have not repotted it. It is in a mix of sphagnum and bark and in a orchid pot (the kind with holes all over). I have also lost one other Hoya with completely different growth medium in a similar manner a few months ago. I don't know if it's a disease or coincidence. What do you think?