If you don’t stop mold at its inception during days 2-4, it is virtually impossible to arrest. Unfortunately, spraying it with agents such as hydrogen peroxide and grapefruit seed extract, rarely yields positive results. In fact, their overuse burns the grass and ruins the crop. The best thing to do is to harvest early before the mold does more damage. Cut the grass above the mold and wash off the blades. Remember, mold on wheatgrass is similar to mold on bread. Although it is unappetizing, it is not pathogenic. Just cut and wash it off.The best way to deal with mold is to prevent it. Mold spores come in on the seed. Your best bet is to buy seed that is selected and identified for wheatgrass. If stored properly, this seed has the lowest propensity for mold. Try removing the greenhouse cover earlier during days 3-6, and spraying the young shoots twice per day to protect them from drying out. This has the advantage of allowing mold spores to escape from the otherwise enclosed space. A small fan in the growing room (not pointed at the grass) is also very helpful to keep mold spores from concentrating in one location. (For more, read “how to eliminate mold” in the book: Wheatgrass Nature’s Finest Medicine.)Refer to the Sproutman Wheatgrass Grower SM-350 user manual for more information.