Alrighty, the store didn't have much for foliar feeding, regardless, I purchased "Liquid Iron (Chelated (whatever that means)) Concentrate" by Bonide. Here are the stats:

Mg - 0.50%
B - 0.02%
Cu - 0.25%
Fe - 5.00%
Mn - 0.25%
Zn - 0.50%

It appeared to be a pretty well-rounded micro-nutrient so I went ahead and bought it. It calls for 2 oz. for 3 Gallon, but I broke it down for one Gallon, and then diluted the amount by 1/3. This all comes down to 1 1/3 tsp per gallon. I ended up foliar feeding the plant at this dose pretty heavily today around 5. I gave it a nice mist spray until the leaves drooped more than they already are. I eagerly await tomorrow morning to see if the purple begins to recede. Stinky and crew, do you have any thoughts or suggestions concerning the feed etc.?