More to explore:
Regrow veggies from the root end of store bought produce! You can apparently do this with celery, green onions, cabbage, and romaine lettuce.
Regrowing produce from store bought produce
storing garden veggies for winter homesteadsurvival...
Veggies that will regrow
trying out regrowing veggies from last night's salad
Regrowing Fruits & Veggies
How to re-grow veggies! Save your produce budget by growing more food from what you already bought!
Grow your own ginger roots from store-bought produce with these simple tips.
Foods that regrow themselves
The Rainforest Garden: Growing Ginger Roots from the Grocery Store
You can grow green onions in your kitchen from grocery store roots; also, basil can root in water on your windowsill!
Onions can grow from the root end of an onion. | 13 Vegetables That Magically Regrow Themselves
How To Regrow Green Onions and Other Veggies... these grew so fast, then I replanted them in the garden... AWESOME!
How to Properly Wash & Store Produce. Handy guide via DesignMom.com