Dyeing with plants, flowers, leaves

I have been creating a dye bath for dipping my wrapped bundles.   My stove top often has more pots of dye cooking than soup!   I can immerse my wrapped bundles into a bath of additional items.  Rhubarb stalks, leaves, berries, seaweed, and you will even see a piece of rebar in this pot.  I am finding that the addition of vinegar sometimes will boost the color I get from a collection of items in the pot.  It simmers away for most of the day.