Mold Growth on Microgreens and Seed Soaking
Mold growth, damping off and improper soak time are all related problems.
The two main causes of both mold growth and damping off are lack of airflow and “dirty” seeds.
Ensure your growing space has adequate airflow by installing fans in your grow room. Humidity can also be an issue so, depending on where you live, using an air conditioner or dehumidifier can work wonders. I like to keep my grow room between 65 and 80 degrees Fahrenheit. Cooler than that and the plants grow too slowly. Higher than that chances of mold increase dramatically.
Some crops are more prone to mold than others. Larger seeds are the usual culprits they are more likely to be “dirty” in that they have a greater surface area to hold mold spores. They are also the seeds that we soak before planting, this resource here
is our growing guide which also shows recommended soak times, always use the lowest soak time to start as you figure out what works best for you. Sterilizing some crops is the best way to prevent mold and damping off.
Check out this resource
in the Seeds and Planting section for advice on sterilizing seeds.