- Name: Compass Plant - Other Common Names: Compassplant - Scientific Name: Silphium Laciniatum - Color: Yellow - Plant Seeds: Fall Sow Seeds Or Cold Stratify - Bloom Time: July - Sept - Hardiness Zone: 3 - 9 - Plant Height: 48 - 120" - Plant Spacing: 15 - 24" - Light Requirements: Sun - Part Shade - Soil & Water Preferences: Average - Dry - Quantity: 10 Seeds - Other: The Compass Plant Is A Long Lived Prairie Plant Native To The Us & Canada. It Is Named For Its Leaves That Often Point Themselves Towards The North & South Like A Compass. The Large 3 – 4” Flowers Are Showy, & They Have Long Bloom Time. They Attract Bees Including Bumble Bees, Butterflies Including An Occasional Monarch, & Birds & Small Mammals Like To Eat The Seeds.