I begin with a piece of desired count of linen, usually a natural color or lighter.
I boil fresh black walnut husks in a pot of water just to cover, till it makes a nice, dark dye....I let that cool, remove the walnuts & strain...then I add some cinnamon, nutmeg & ground clove to the dye ~ perhaps a smidge of vanilla too :)
I add just a little water to it, to weaken it a bit....then I blotch & splotch the dye onto random spots of the linen which has been placed on an old cookie sheet...then I lay it out in the sun to dry, or you could use a low oven too.
I stitch in hand (no hoop) so it gets rumpled, but that is a wonderful look....
I keep my dye at room temp for about a week, then make up more as needed.
I hope these directions make sense ~ I kind of just 'play' at it !
Blessings from the Farm...