A single plant infested with mold has the potential to contaminate your entire crop. Absolutely everything from the rest of the plants in the middle of culture and even the containers. If you grow indoors, the culture room or tent needs deep cleaning to ensure that no spores survive and infests the next crop.
This is a nightmare scenario, you can try to fight with various anti-mold agents, but plant losses will be high anyway. Weed rot is a threat that any cannabis farmer worthy of the name has to monitor at every step, from seed to joint.
A moldy grass is a waste and no smoker should consume it knowing it, in any form
May the force be with you 💪
Good luck for your grow🌱