- You Will Get 50 Seeds Of White Rock Soapwort Saponaria Vaccaria Alba Flower Seeds. - Description: - Name: Rock Soapwort. - Scientific Name: Saponaria Vaccaria Alba. - Color: White. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 6 - 12". - Plant Spacing: 24 - 36". - Bloom Time: July – Oct. - Hardiness Zone: 2 – 10. - Light Requirements: Sun - Part Shade. - Soil & Water Preferences: Average – Dry. - Other: Soapwort Is An Excellent Fast Growing Ground Cover Or Rock Garden Plant. It Also Makes A Wonderful Potted Plant Or Cut Flower. They Are Commonly Found In Florist’s Shops And Are Uséd Like Baby‘S Breath. They Can Tolerate Any Soil So They Are Great For Those Tough Spots Where Nothing Else Will Grow. On Top Of Being Extremely Cold Hardy, These Plants Also Reseed Themselves, So They Are Carefree!