[eric-hu]

I am curious about how regolith would act as a growing medium.

[sampo]

Plants grow, but not very well.

https://www.nasa.gov/humans-in-space/scientists-grow-plants-...

[cratermoon]

Note that the article says "A nutrient solution was added daily". The linked paper mentions "MS nutrient solution", meaning <https://en.wikipedia.org/wiki/Murashige_and_Skoog_medium>.

In other words, the regolith served as a challenging substrate, as long as all the necessary nutrients were added. Without those additions, definitely not.