I returned to this horrible sight after being gone for the weekend. The leaves on the Nugget plant have turned pale yellow with large brown/rust patches on them. At this point, the Cascade plant isn't showing any of the same issues. Leaves are dying off on the lower portion of the plant, but that's normal. I checked the ph level of the soil and its between 6 and 6.5 which is within the preferred range for hop plants. I'm attempting to research the issue online, but if anyone reading this has any ideas or suggestions, please feel free to comment.