HomeCup-PlantSilphium perfoliatum$1.95PricePlant Height6-8'Plant Spread2-3'Flower ColorYellowBloom PeriodJul-AugCompanion PlantingsCompanion Plantings: Monarda fistulosa, Eryngium yuccifolium, Asclepias incarnata, Eutrochium maculatum, Veronicastrum virginicum, Echinacea sp., Vernonia giganteaSeed Cost Per Oz.$10.00