Health food retailers sell various brands of bottled wheatgrass juice or wheatgrass supplements to their customers, but purchasing enough for daily use can be expensive. Fortunately, wheat seeds germinate quickly when grown in trays, and with frequent plantings, you can always have a fresh source of wheatgrass to supplement your diet.
Purchase organic wheat seeds, called "wheat berries," for growing in seed flats, if possible. While complete wheatgrass growing kits are available, you can save money by buying the items separately. If you're buying your own wheat berries, contact a local farm cooperative about buying the seeds in bulk.
Soak a couple of handfuls of wheat berries overnight in a glass jar, covered with water. Soaking softens the seeds and speeds germination.
Fill the bottom of the seed-starting tray with approximately 1 inch of sterile growing medium and moisten it by spraying with distilled water until the medium is damp but not soggy.
Drain the wheat berries and distribute them evenly over the surface of the growing medium. The seeds may touch each other. Since you'll be harvesting the wheatgrass before the roots are fully developed, it's OK to crowd the seeds.
Place the clear plastic tray cover on top of the tray and set the tray in a spot out of direct sunlight. If you don't have a cover, use a large piece of clear plastic wrap. Cover the tray with newspaper to block out additional light.
Inspect your wheat berries every day for signs of sprouting. Once the tiny translucent shoots appear, remove the plastic cover and place the tray where it will receive filtered sunlight. Sunlight is vital in the production of chlorophyll. At this point, you may also place the tray under grow lights.
Water your tiny wheat plants to keep the soil damp and mist the tender shoots with water once a day. Harvest your wheatgrass when it reaches 6 to 8 inches tall by cutting it 1/2 inch above the soil level.