"One of the many
controversies in the wheatgrass world is the question of whether
growing grass hydroponically is good enough. We have addressed
this question and have taken the position that for indoor gardening
wheatgrass is just as potent whether you grow it in soil or in
water. Of course, adding liquid kelp or other mineral products
to that water enhances your results.
Here we have an actual lab
analysis so you can see for yourself. Two trays were grown in
the same greenhouse under the same conditions using the same
seed. One used composted organic soil, the other just water.
According to Mr. John Howell, of the soil lab at the University
of Mass. Extension, the two products are virtually equal: "It
appears as though the grass has not begun to get nutrients from
the composted soil but is still growing off the initial nutrient
base of the seed."