Thank you, Ric. I have been adding organic material in the beds I created on the house pad level for years, now. I've used everything I could glean at least twice a year.
It took me a while to connect the dots, but the house pad garden is actually subsoil as the house pad was cut out of a slope. There was no plant organic material in that "soil". It was just very dense rock with clay and silt between the rocks. It wouldn't even grow weeds the first year after I had the decorative rock the previous owner of the house had used removed.
There was no way I could even begin to dig a hole with a shovel and I was too inexperienced to know that I should have created whole beds. I do have perfect drainage ...
I only mulched the beds I created and didn't mulch the areas outside of the beds. I used the no-till gardening method because by the time I hauled everything home, I didn't have the energy to try and dig stuff into rock.
With all of the stuff I have hauled back to the garden and put in the beds, the soil is now viable. The humic acid created by decomposing organic material has virtually made the rocks disappear and I can now dig in the beds easily.
While you guys were suffering through your blizzard, I was outside weeding and mulching because we generally get a winter thaw at the end of January. I saw lots and lots of worms and those white strings of fungi and insects working in the soil.
I am not sure what you mean by "amend". I think I would need a soil test to know what to add to the soil, but I am not sure.