I have an image which has some rose foliage near the bottom of the image, which I have printed with no problems. Recently, I tried to print another copy and the green foliage is coming out dark, dull green instead of the vibrant colors seen earlier. The nozzle check on the printer (Epson 7900) was good. I have even printed a green color purge file in which the color looks good.
I printed this image on my Epson 3880 for comparison and it gave vibrant green foliage as expected. In both cases I am printing from Lightroom on Epson Exhibition Canvas with the same printer settings.