Solar dyeing is so easy even the kids can do it. To prepare, wrap wool around the back of a chair. Tie with white string in a couple of places. Add mordant (for wool, ¼ teaspoon alum and 1/8 teaspoon cream of tartar) to a 1-litre jar and half fill the jar with lukewarm water. Stir to dissolve mordant. Add wool and plants (we’ve used lady’s mantle) to within 2cm of the top. Cover with water. Stir, put on lid, and place jar in a sunny spot. Leave for 10 days. Stir once a day. After 10 days, remove yarn, rinse in lukewarm water, then dry.
Armed with a tub, plant materials and ingredients from your pantry, you can turn plain fabrics into vibrant superstars.