Learn how to garden like a pro with this alternative gardening methods. Like Aquaponics, Pallet gardening, Straw Bale gardening, Square Foot Gardening, Cinder block gardening...
Green Onions/Leeks and Celery/Romaine Lettuce/Cabbage have the same process. I would like to add that you will get better luck from organic produce, as GMO produce in general does not reproduce on their own.