Mustard greens are fast growing, nutritious leafy greens. They're perfect for gardens and containers in both spring and fall. They are a high biomass, nitrogen lifter for growing over the summer. It is one of the quickest growing, green manuring species and is very good at suppressing weeds. Used for creating short term green cover and game cover. Mustard Greens aka Mizuna, Mustard Spinach, Indian Mustard Annual plant Height: 6" Width: Up to 2' Mustard Greens are a leafy plant with a zesty mustard flavor that is a fiber and nutrient-rich addition to salads and stir-fries. Types: Curly Leaf. Curled or frilled leaf edges resembling Kale. It's a very spicy tender green used in salads. Flat Leaf. Broad delicately flavored leaves are good for steaming or in soups. Mustard Spinach. Smooth leaves. This plant is more tolerant of heat, making it a good choice in warmer climates. Starting Seeds of Mustard Greens Seed Depth: