200 TALL WHITE BONESET (Thoroughwort) Eupatorium Perfoliatum Flower Seeds BLOOM TIME: Summer - Fall HARDINESS ZONE: 3 - 9 PLANT HEIGHT: 36 - 48" . . . PLANT SPACING: 18 - 24" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Wet Boneset is a Eupatorium and looks like the other Joe Pye Weed varieties.