Last week we gathered some friends and dyed some fabric with these gorgeous oak galls that a friend harvested up in Ukiah. Oak galls are growths on oak trees created by interaction of the plant hormones with the chemicals the wasp deposits. The wasps lay their eggs in the newly formed leaf buds and the gall results. The gall is a contained space for the wasp's larvae to hatch and a food source for the larvae. The dye has been historically used across Europe and the Americas to create ink and brown, grey, and black dyes. Because the galls have alot of tannic acid they were used for tanning animal leathers. We dyed some cotton sheets and some silk scarves over a wood burning stove.