@Lucky777, Agreed. It also makes transplanting very easy since the soil is held together by a lot of different roots. Another benefit is less root rot. You need to water more often using the cover crop, but its much harder to drown your roots since both the cover crop and cannabis are pulling water out of the soil.
@clara,
I have done it with Mint and another time with Wild flowers, but never that mix. I love full organic grows, they add a flavor profile that you really can’t mimic with salts.