- Name: Queen Of The Prairie - Other Common Names: Meadowsweet - Scientific Name: Filipendula Rubra - Color: Pink - Plant Seeds: Fall Sow Seeds Or Cold Stratify - Bloom Time: June - July - Hardiness Zone: 3 - 8 - Plant Height: 48 - 60" - Plant Spacing: 18 - 24" - Light Requirements: Sun - Soil & Water Preferences: Moist - Quantity: 10 Seeds - Other: Queen Of The Prairie, Also Known As Meadowsweet, Is Native Only To Moist Prairies Of The Us. They Have Become Quite Rare In The Wild Due To Loss Of Habitat, & Are Listed As An Endangered & Threatened Species In A Total Of 6 States. Queen Of The Prairie Does Like Moist Soil, & Can Be Grown Anywhere It Gets Enough Water, Or The Plants Can Be Naturalized.