- You Will Get 20 Seeds Of Purple Dragon Fruit Pitayastrawberry Pear Hylocereus Undatus Cactus Seeds. - Description: - Name: Purple Dragon Fruit (Cactus). - Other Common Names: Pitaya / Pitahaya Fruit / Strawberry Pear. - Scientific Name: Hylocereus Undatus. - Color: Purple Flesh. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 15 - 20' Vine/Climber. - Plant Spacing: 12’. - Bloom Time: July – Oct. - Hardiness Zone: 9 – 11. - Light Requirements: Sun. - Soil & Water Preferences: Average.