I try to be careful when labeling skeins of yarn I dye, but these results were startling enough that I would like to repeat the procedure to make sure I did not screw up.
The dye bath source was black hollyhock blossoms (dried). Hollyhocks are biennial, which means they bloom the second year after planting. Half my plants did not make it through the winter, so there weren't many blossoms to work with.
They produced a lovely purple dye bath, but as we know from the dahlia dye experience, that does not mean one will get purple yarn. This time I *did* get purple (or lilac) yarn, but also a deep blue green. Wha'?
According to my labeling, the skeins in the above pic are (from the left): no mordant, no modifier; alum mordant, no modifier; alum mordant, acid modifier; alum mordant, alkaline modifier; alum mordant, iron modifier; rhubarb leaf mordant, no modifier. The only one I am 100% sure of is the rhubarb leaf mordant one.
Above, from left, no mordant, alum mordant, rhubarb leaf mordant, but no modifier on any of these.
Above, all alum mordant; from left, acid modifier, alkaline modifier, iron modifier.
Above, three shades of green; below, three shades of purple.
I planted more hollyhock this year, so hopefully I will be able to try this again. And I also hope I have more blossoms to work with. Fingers crossed!