It's a gamut issue. I've used a 2200 for the past several years, and have fussed extensively with this same problem. Evergreen trees, especially pine trees, get their detail fuzzed out. A new 2200 won't fix it; mine has always been this way. What's going on is that the Epson printer profiles for this ink set aren't optimized to reproduce this color well, and what look like different greens on the monitor get converted to nearly the same green by the printer profile. If you're using the Epson profiles that came with the printer, you'll probably see a slight improvement by buying a custom profile for your paper type (at least that was my experience), but it's only a slight improvement. What I ended up doing (though for other reasons also) was to try several non-Epson papers, and finally found one that didn't do it nearly as badly (though still to some extent). The 2200's inks just don't seem very good at rendering that shade of green. Perhaps one of Epson's newer printer inksets would be better, but I haven't done the upgrade yet myself so I don't know; can anyone else here comment on that?
Lisa