Sometimes I place the fiber directly into the pot as I am heating the goldenrod. This saves some time since it combines two steps. The downsides are that the flowers will get stuck in yarn or thread that you’re dyeing. They shake loose later but it can make a bit of a mess. If you dye fabric with this method, it can result in uneven color since the flowers are touching the fabric and the fabric cannot move around freely in the pot. Dye can’t penetrate into areas where the fabric is folded or bunched up so stirring it throughout the dye process is important.
The photos below show silk embroidery floss being dyed. I placed the thread in the pot after the flowers had been simmered. It had cooled a bit but was still warm when I put the thread in. You can see the fiber started to turn yellow almost immediately. They were left in the dye pot overnight and you can see in the second photo that both dye and silk thread are much darker yellow.
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