Silphium laciniatum
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Hardiness Zone: 3-8 Height: 1.5-2.75 metres; 5-9 feet Spread: 0.5-1.0 metre; 1.5-3 feet Sun: Full sun Water: Dry to medium Wildlife: Attracts butterflies; seeds favoured by birds and small mammals Bloom Colour: Yellow Tolerates: Poor soils Culture: Easily grown in average, medium, well-drained soils in full sun. Prefers clay soils. Noteworthy Characteristics: Compass plant is a tall, sturdy, rough, bristly plant featuring sunflower-like flowers (to 5 wide). Very large Garden Uses: deeply cut basal leaves (to 18