take weeds with a seed head like foxtail, cut when green, & with a full seed head
as with flowers, weeds will also take up water or any other liquid.
try placing some weeds in different color dyes.
the weeds will take up the dye, & will take on the various colors.
the longer you leave the weeds in the dye, the darker they get.
when done, hang upside down to dry.
make super arrangements.