[dice]

I treated an iron deficiency one year with a parsley [edit: !celery]
plant pureed with water in a blender and a double dose of fish
emulsion. It was a pretty mild deficiency, just starting in the growing
tips, but that worked. (The fish was overkill. It was a Madara plant
that took off like a rocket a couple of weeks later and grew
over the top of the 6' trellis and started back down the other
side, but at least it did fix the iron deficiency.)