For an eight - quart pot (which is ideal for dying a few garments), she recommends at least 1 1/2 cups of produce or 1 cup of powdered spices. (bonappetit.com)
It's the only powdered spice in the whole recipe, but it goes such a long way. (jessicainthekitchen.com)
It is typically dried and ground to make the more familiar powdered spice. (chilipeppermadness.com)