Annual Crops: Annual crops require only one growing season to produce seed and complete their lifecycle. But because you are growing the crop for seed rather than fruit, you may have to plant the crop earlier than usual and harvest much later.
Biennial Crops: Biennial crops require 2 growing seasons to produce seed and complete their lifecycle.
• These crops generally require a period of vernalization (exposure to cold) in order to flower. [Tip: Before exposing the vegetable to the cold (less than 45 degrees Fahrenheit), they should be partially developed].
Cabbage stems should be at least as large as a lead pencil in diameter.