Helianthus giganteus (Giant Sunflower)
Helianthus giganteus (Giant Sunflower)
180 (300)cm, Giant Sunflower is a herbaceous, very variable perennial with upright stems crowned with clusters of bright yellow flowers. Native of semi-moist meadows and open spots in woods in N USA. For any humus rich, well drained soil in a sunny spot. VII-X.More Details »