Cup Plant | A big beast of a plant for the sun garden. Starting with a low mound of coarse foliage, this North American native sends up a huge stalk up to 8-9' tall that produces several bright, cheerful, small sunflower-like flowers in mid to late summer. Its seeds are favored by a wide range of birds in late fall and early winter. Makes quite a statement in the garden but make sure you put it where you want it. Cup plant has a huge tap root system and is difficult to move once established.