cactus flowers

My friend Pat gave me a bunch of frozen cactus blossoms to experiment with.  She has an Orchid Cactus.  I covered the flowers in white vinegar in a jar and left them overnight.  I then heated the flowers vinegar mixture to a boil and took it from the stove.  After steeping awhile I removed the flowers and put in some yarns (they're mostly wool).  I'm very pleased with the results!  Who would have thought the colour would be so strong.  There were quite a few flowers.  I didn't use any mordant and rinsed them out thoroughly afterwards.  I want to use the dye mixture with something else.  Let me know if you're experimenting with natural colours by commenting below.