Lou Ann: Go to www.oceangrown.com
It is possible to grow hydroponically - with out dirt. Ocean water (comes in a concentrate) is the perfect fertilizer. It comes with beneficial bacteria, enzynes, amino acids, 92 trace minerals. I now grow wheat grass in the house and it doing very well. I am also using it on my pastures. You will find that ever thing grows better - not bigger - with better taste and complete nutrition. If you will get a copy of Dr. Murray's book and look at the research he did 50 years ago you will wonder why we as a society have let large corporations kill us with chemicals. Did you ever think why fish in the ocean never have cancer and/or tumors and fish in lakes and streams, and people on land have lots of cancer and tumors. It is the 92 trace minerals, enzymes, amino acids, etc from the sea water.
You can get his book from www.acresusa.com
Good luck and stay away from chemicals - remember "Better Living through Chemistry" is better for Monsanto, ADM, Cargil, Tyson, Dow, etc --- not "us"
Robert D Bard