After picking up the sample box and form at my library (check your cooperative extension service for information), I began with the blueberries, which are planted among perennials in a bed along my back fence. A home test had indicated the soil was not acidic--a big no-no for blueberries. I wanted to confirm that and see if there were other nutrient deficiencies.
First, I brushed aside the mulch.
Next, I mixed the soil together in a pot.