- You Will Get 100 Seeds Of White Sweet Everlasting Gnaphalium Obtusifolium Butterfly Flower Herb Seeds. - Description: - Name: Sweet Everlasting. - Other Common Names: Sweet Cudweed / Old-Field Balsam / Life-Everlasting / Rabbit Tobacco / Indian Posy / Cat's Foot. - Scientific Name: Gnaphalium Obtusifolium Syn. Pseudognaphalium Obtusifolium. - Color: White With Yellow Centers. - Plant Seeds: Fall Sow Seeds Or Cold Stratify. - Bloom Time: July – Sept. - Hardiness Zone: Annual / Biennial. - Plant Height: 20 - 32". - Plant Spacing: 12 - 18". - Light Requirements: Sun. - Soil & Water Preferences: Average – Dry.