More Gorse. Still in search of yellow.

I'm trying to capture all the early Spring yellows again, before they fade and die back. Most of the gorse on the side of our local lake has gone over, but some late yellow blossoms are still attracting the bees and this amateur dyer. Last time my colours looked like this, from the left, mordanted with alum, copper, alum+tin and alum+iron (my gladden and sadden method). The tin really popped!

This time, they look like this. From the left, un-mordanted, then mordanted with alum, copper and alum + tin. I've been leaving out the iron in my search for good yellow shades, because iron dulls yellow to brown. I'm almost regretting my intention to over-dye these skeins.