Save money by regrowing these 10 foods that regrow in water without dirt. Perfect if you don't have room for a garden & trying to save a few bucks! Regrow lettuce, regrow celery... regrow vegetables with one of the best budget tips of the year, and easy for anyone to do! :: DontWastetheCrumbs.com
Hydroponic Lettuce Garden from Plastic Bottles (Grow Bottles) : Instructable by Professor-Mousedude This looks like a very useful instructable! It gives an inexpensive fertilizer (hydroponic liquid) recipe that I haven't seen elsewhere.