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Growth habit.

Asteraceae

Huge opposite perfoliate leaves surround square stems. Loose panicles of bright yellow sunflower-like blooms that have petals wider than the species S. perfoliatum.

Plant Type: perennial

Plant Form or Habit: upright/vertical

Plant Use: In the back of beds and borders; as a specimen plant, or planted in groups as a screen.

Propagation:

division

Flower Color:

yellow

Bloom Period:

early summer
mid-summer
late summer

Width: Minimum: 48 inches     Maximum: 76 inches

Foliage Texture: coarse

USDA Hardiness Zone: 4

Water Requirements: average

Additional Comments: Also known as S. perfoliatum var. connatum. Because the leaf bases hug the strong stems, rainwater collects there and is attractive to wildlife. Prefers poor soil. Fertilizer will cause this plant to flop over.