Cold wash on delicate or hand wash with a pH neutral soap (when in doubt, Dawn dish soap is amazing!) and lay flat to dry. Never use bleach or Oxyclean
Please note that the color of your naturally dyed garment will change over time as it is exposed to direct sunlight, similar to vegetable tanned leather
Natural dyes can also be sensitive to acids, and immediate spot treatment with cold water is the best way to mitigate acid contact