The conventional wisdom among many wheatgrass growers is that eliminating mold completely from wheatgrass as it grows is nearly impossible. According to research and testing performed by Steve Meyerowitz, the mold that often grows on wheatgrass is not harmful to human health unless you have mold allergies or sensitivities. Nonetheless, most wheatgrass growers seek to prevent mold when growing wheatgrass. Take a few basic steps to reduce or prevent mold on your wheatgrass.
Measure out enough seeds to cover the bottom of your sprouting tray in a single layer.
Place the wheatgrass seeds into the metal strainer, and rinse them in cool water.
Place the rinsed seeds into the container or bowl, and cover the seeds with approximately three times as much water as seeds. Allow the seeds to soak for 12 hours.
Drain the water off the seeds, and soak the seeds again for another 12 hours and then a third soaking for another 12 hours. The extended soaking time will help the wheatgrass seeds expand to a larger size, and this will enhance germination and hasten sprouting time (both of which will reduce mold occurrence).
Drain the seeds for the final time.
Line the bottom of the sprouting tray with paper towels. Spread the wheatgrass seeds evenly over the paper towels. Make sure the seeds cover the paper towel in a dense layer, but they should not overlap. The space between each seed is important for reducing and preventing mold.
Cover the sprouts with a layer of newspaper. Spray the newspaper with the spray bottle to moisten it. As you continue to moisten the wheatgrass seeds, do so by spraying the newspaper and not the seeds directly. This will help keep the seeds at the proper moisture level and reduce mold. Remove the newspaper when the wheatgrass sprouts.
Fill the water reservoir tray with 1 to 2 inches of water, and place this beneath the sprouting tray after the wheatgrass sprouts. This will moisten the wheatgrass sprouts from the bottom up. Often if mold is going to develop at this point, by watering from the bottom up you encourage mold to develop underneath and not above on the sprouts.
Keep the wheatgrass sprouts lightly moist with the spray bottle, even though you are watering from beneath.