I recently read a blog post by Mari at Gather and Grow, she had dyed with turmeric using solar dyeing and without any mordants. I had a look around in my spice rack and found a jar of turmeric powder that had expired four years ago. I decided to have a go with that. I used mordanted wool because that’s what I happened to have (alum and cream of tartar) and I also used heat. I heated the water and mixed the turmeric powder into it. When I added the wet yarn the dye immediately dyed the yarn and I only let the yarn be at the dye for 15 minutes. I used the the dye again and dyed another 100 g skein of wool and it came out exactly the same colour. Turmeric is strong stuff! I feel like a much less turmeric would have been enough and that I could still dye a lot of yarn with the dye. I have it saved it case I want more. The only downside is that the smell stays quite strong in the yarn, even though I rinsed it a lot.