Any ideas about what the problem is with my clem? Pic
This is Madame Julia Correvon in a whiskey barrel. She has done awesome all season, bloomed beautifully, and even just had a smaller bloom recently. This is her 2nd full year with me. She is planted in a mix of Miracle Grow Potting MIX, peatmoss, perlite, vermiculite, pine fines, slow-release fertilizer, Osmocoted this spring and top dressed with compost/composted cow manure too. I did add a small sprinkling of Tomato Tone a couple weeks ago and watered in. She is planted on the southwest side of my house in full sun almost all day long. Performance has been fine but now she is developing these yellow mottled leaves all over. The mottling seems to be on all the older leaves and none of the newer leaves.
Could it be a nutrient deficiency? Spider mites? I don't see any evidence of webbing all over the leaves though. Hmmm... Not sure and I don't want to add anything else and stress her out more.