Actually, they are very close. A study done on the nutrient content concluded that both grasses were equal (read: Wheatgrass Nature’s Finest Medicine). Hydroponically grown grass (no soil) can benefit from nutritional products such as liquid kelp and Ocean Grown. Both add a wealth of minerals that the roots absorb by osmosis. Similarly, soil gardeners can add fertilizer to enrich the soil.
Image Caption: Only 1-2 inches of soil is necessary for a successful crop.
Dr. Chiu-Nan Lai, of the University of Texas System Cancer Center, used soil-free wheatgrass in her research and still reported that “the inhibition of activation of potent carcinogens is quite strong at a reasonably low level of extract.” And Robert Nees, former director of The Optimum Health Institute, the largest wheatgrass retreat center in the world, served hydroponic wheatgrass to his guests throughout the 1980’s and reported there was no discernable difference. Again, the big picture is paramount to your decision – which approach fits best into your lifestyle? For more information about wheatgrass gardening and therapeutic usage, read Sproutman’s Wheatgrass Nature’s Finest Medicine.