How to Prevent Mold When Growing Grasses in Containers

Because of the mold that I have found on my wheatgrass, I have done some research on this subject, and have learned that mold is actually quite a common problem when growing wheatgrass. And while mold doesn’t look very appetizing, it isn’t harmful to our health. As long as we cut the wheatgrass way above the mold that is grown on the soil, and rinse the grass, it is safe to juice them or give them to our pets as snacks (a large number of young grass species, including wheatgrass, can be fed to pet, check Cat Grass or Wheatgrass? for more details).

While mold is a common problem when growing grass in container, it is preventable. Here are several ways to prevent mold from growing on grass.

• Create air circulation

This is important especially when the temperature and humidity is high. Mold tends to grow best when it is hot and humid (above 80 degree F, 25 degree C). If you cannot grow your grass outdoor, use a fan to increase air circulation. I am glad that I have put my bowl of wheatgrass in the balcony once I have found mold on the grass. The mold problem has eased after a while. Even though it has been humid and rainy in these few days, the strong gusts of wind have provided very good air circulation.

• Use only clean growing container and sterile soil
• Plant less densely

Lay out the seeds in the tray densely, but only in one layer, so to give enough breathing space for each sprout and improve air circulation. I think I may have planted my wheatgrass a bit too densely.