I moved into a new home in October. The garden beds outside had not been maintained in a very long time. I am working to restore the front one. After removing a ton of dead bush roots, a gajillion lillies of the valley and many peonies, I did a soil test through you guys. The soil test showed phosphorus in optimum range (51 ppm) and magnesium and potassium above optimum range (250 ppm and 181 ppm, respectively). Soil pH was 7.2. Since this is my first time gardening, I decided to start small and just plant a row of petunias and some coral bells and one oregano plant, just for fun. Not many of my plants have grown past the potting soil they came in. Of the wave petunias I planted, only two have really spread. I've noticed that my soil is quite sandy so I have been watering every other day unless it rains. I also fertilized using the guidance from the soil test (it was just to add nitrogen). That did green everything up a bit and make the petunias flower more. Most of the petunias are in full sun. A few are in shade under a tree and I don't expect them to do as well. What am I doing wrong? Next year, I'd like to delve into some native perennials but am too afraid I'd be wasting my money if they won't grow in my flower bed. I have included some pictures here for reference.