That was my question as well. But I think the article says the scientists didn't know if something in the lunar soil would actively inhibit plant growth. It lo

That was my question as well. But I think the article says the scientists didn't know if something in the lunar soil would actively inhibit plant growth. It looks like the answer is no, and you can use it as an effective substrate for what is essentially a hydroponic type setup where the nutrients are all added.