What soils and/or other products can I add to my soil that might sustain shrubs and/or flowers?
Soil Preparation for Flower Bed
Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/special/organic/the-importance-of-soil-for-an-organic-garden.htm
We also have an extensive selection of articles relating to various types of manures and compost found here: https://www.gardeningknowhow.com/composting-basics