"And isn't it ironic, don't you think?"
Random musings and free-association: The chemical symbol for iron is Fe, Fe is the beginning of Fear, and Fear can become phobia, which is this year's HAG theme.
Common cacher phobia: a tiny green nano hidden deep within a lush wall of ivy.
Common cacher irony: the new cacher instantly finds that nano after you've spent an hour looking.
Due to the unreliability of gps readings in this area, very specific hints have been given. All of the caches in this series should be easy finds.