I recently planted some flowers in my back yard and I don’t think I adding enough garden soil to the existing soil. The soil where I live is very poor and essentially has no nutrients. The flowers haven’t dried or shown any signs of dying but they haven’t had much growth in the past month. So I was wondering if adding better soil on top of the existing soil and around the flowers would help the flowers at all, instead of having to dig up the flowers and add more there.
That soil does look very compact and dry. I would add a layer of a half and half mix of soil, and compost. 3 to 6 inches of a layer out to about a foot from the plant in each direction radially should do it.