Eupatorium gives soft egg-yolk yellows that range into oranges. When used with an iron mordant it can be used for an earthy moss greens, when overdyed with indigo it provides a satisfying range of yellow to blue greens.
Mordanting: Use alum mordant at 15% WOF for protein fibres. For cellulose, mordant with tannin at 8% WOF and then either alum at 15%, or aluminum acetate at 8%.
Dyeing with the extract: Use at 10-15% WOF for a medium depth of shade.
Dyeing with the ground leaves: Use 20-30% WOF for a medium depth of shade.
Options: When used with an iron mordant eupatorium can give earthy moss greens, when overdyed with indigo it provides a satisfying range of yellow to blue-greens.