Wheatgrass juice is a source of nutrients, including vitamins and minerals, along with chlorophyll and essential amino acids. Proponents say it strengthens the immune system, fights illnesses, lowers cholesterol and increases energy. While it is possible to buy wheatgrass for juicing, growing it at home is relatively easy, less expensive and much fresher. Wheatgrass can be grown inside in vermiculite, which is derived from a mica-like mineral, holding moisture and dispensing nutrients much like soil but minus the mess.
Place 1 cup of wheatgrass seeds in a bowl and add water just to cover. Set aside the bowl for eight to 12 hours, then drain the seeds in a colander lined with paper towels and rinse them under running water. Set the seeds aside for another 12 hours. Rinse and set them aside one more time for 12 hours. Afterward, the seeds should have sprouted tiny roots and are ready to plant.
Add vermiculite to a seed tray that has drainage holes. Fill to the rim of the tray and mix in water until the vermiculite is completely wet.
Sprinkle the sprouted seeds over the vermiculite and press them down gently. Spray the seeds with water to moisten them and loosely place a piece of plastic wrap over the tray. Set the tray away from sunlight for about five days or until seedlings appear. Spray with water each day to keep moist.
Remove the plastic wrap once the seedlings are about 2 to 3 inches tall and are starting to push the plastic wrap off. Place the tray in front of a sunny window that will help produce the chlorophyll in the grass, turning it green.
Harvest the wheatgrass when it reaches about 7 inches tall by cutting a handful of grass down to the soil. Only cut as much as needed at a time and store the rest of it in the tray in the refrigerator.