- You Will Get 100 Seeds Of Heal All Self Heal Prunella Vulgaris Purple Herb Flower Seeds. - Description: - Name: Heal All. - Other Common Names: Self Heal / Heart Of The Earth. - Scientific Name: Prunella Vulgaris. - Color: Purple. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 6 - 12". - Plant Spacing: 6 - 9". - Bloom Time: Summer. - Hardiness Zone: 4 – 9. - Light Requirements: Sun - Part Shade. - Soil & Water Preferences: Average.