You have a garden, I am very enviable. I live in a condominium and there is only a small balcony where we can grow plants. But it is hard to pull out weeds once every 3 weeks... I have never heard of "the ground cover", is different from a lawn? I think it is very nice idea to suppress weeds without using chemical substances.
By the way, I saw the planter that planted Komatsuna in this morning. There were a lot of insects like small flies on the soil. Mary gold may have been killed by them :(