Silphium trifoliatum (Whorled Rosin Weed)


Silphium trifoliatum (Whorled Rosin Weed)
150 (300)cm, Whorled Rosin Weed is a very showy, tall herbaceous species with lance-shaped to ovate leaves arranged in distinct whorls of three to five and sunflower-like bright yellow flowers. Native of rich soils in open woods. Easily grown in a rich, well drained soil in a partially shaded to sunny spot. VII-IX.

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versions:
seed package - 0024