What you say is very interesting and important. Each soil and each crop or plant has different characteristics and each one is best used in a certain environment. There are soils that need shade to be fertile, as is the case with you who planted the plant under a coniferous tree. That shade is very important for the soil and for the plant so that it can absorb most of the nutrients from the soil. Thanks for the vote and for everything.
RE: Moving on to the second retaining wall