Anyone who can make a pot of tea can dye a skein of wool or yard of plain linen to whatever color they want, using commonly found plants.
Making Natural Clothing Dye From Vegetables - Countryside
Botanical Dye with Weeds: Oxalis - Aunt Jenny
Dyeing Dye, India textiles, Dyeing techniques
Using Pomegranate in Eco Printing
How To: Make Your Own Natural Dyes - Modern Farmer
Natural Dyeing: Modifying Colour and Expanding Your Palette – the thread
Essential Natural Dye Tools and Materials - Timber Creek Farm
DIY Natural Food Coloring and Homemade Colored Sugar Crystals - Oh, The Things We'll Make!
USDA Home Dyeing With Natural Dyes 1935 - PINE MOUNTAIN SETTLEMENT
Sappan Reds and Purples How to dye fabric, Mixing fabrics, Eco
10 Cochineal dyeing ideas botanical dyeing, dye, how to dye fabric
32 Foraging for Color ideas natural dye fabric, how to dye