Samples of wool which I dyed with various natural dyes last summer. They are Brazilwood, Madder, White Onion skins, Red Onion skins, Turmeric,Weld, Indigo and Ornamental Maize and some which are a mixture of two of these. They were all mordanted with Alum.
Fabric dye - Non-fading Pokeberry Recipe - Pokeberry colors range from bright fushia to magenta to raspberry, and will last for several years by following this recipe. Over-dyeing fabric in indigo, once the pokeberry is set, will give purples. The berries are gorgeous, but fatally toxic. WEAR GLOVES!