- You Will Get 50 Seeds Of White Swan Clary Sage Salvia Viridis Horminum Herb Flower Seeds. - Description: - Name: White Swan Clary Sage. - Scientific Name: Salvia Viridis Syn. Salvia Horminum. - Color: White. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 18 - 24". - Plant Spacing: 12 - 18". - Bloom Time: Summer – Fall. - Hardiness Zone: Reseeding Annual. - Light Requirements: Sun. - Soil & Water Preferences: Average.