Foliage - 1 part glycerine/2parts water (or 50/50), 6" in jar, heat mixture, put stems in & leave 3 weeks.
Roses/Zinnias, etc - 1 part Borax/5 parts cornmeal, 1/4" on bottom of box, place flower face down & sprinkle more powder over.
Dried leaves - Iron with cloth & hot iron