Collard greens DescriptionBotanical Name: BrassicaCool-season Vegetable that is rich in vitamins and minerals. Plant early spring for summer harvest and again in the fall for winter harvest. The plant is grown for its large, dark-colored edible leaves It has an upright stalk, often growing up to two feet tall. Plant CharacteristicsPlant Category: Herbs & VegetablesName: Collard greensPlant Type: VegetableMature Size: 2'Water: ModerateExposure:: Full sunSpacing: 24"Soil Type: Clay; loam; sand; acidic; alkaline; well drainedPlanting Time: Spring or Fall CommentsComments: If you maintain ample soil moisture during hot periods in the summer and control insect and disease pests, collards produce an abundant harvest.