Invariably, soil needs a boost. The solution is simple: organic matter. Add a 2- to 3-inch layer of compost, decayed leaves, dry grass clippings or old manure. If you’re digging the soil, till the organic matter into the soil. If you decide not to dig or are working with an established bed you can’t dig, leave the organic matter on the surface, and it will work its way into the soil in a few months.
To learn more about your soil, have a soil test done through your county cooperative extension office. They’ll lead you through the procedure: how much soil to send from which parts of the garden and the best time to obtain samples. Expect a two-week wait for their findings, which will tell you what your soil lacks and how to amend it.