Perennial Vinca Periwinkle Flower Seed for Planting Outdoor-Non-GMO Heirloom Annual Garden Flowers Open Pollinated Features:Winter interest, suitable for slopes, ground covers, evergreens, dry soils, deer resistant, best for beginners Water: Best with regular water - weekly, or more often in extreme heat. Tolerates dry shade once plants are established. Light: Sun tolerant in cool northern zones. In hot summer areas, plant in dappled to deep shade. Soil: Prefers moist, well-drained, but tolerates a wide range of soils, even poor and sandy/dry if regularly watered during times of drought. Uses: Alpine and rock, Container gardening, Edging, Erosion control or embankment, Ground cover, Massing, Naturalizing, Rain garden, Rock garden, Slopes, Small spaces, Under planting.