If you have an existing garden that has not been managed with an eye towards ongoing soil management, you likely have depleted some (or most) of the essential nutrients. You many also have an overly acidic or basic pH. Plants absorb significant quantities of nutrients from the soil each year, and unless you are actively replacing these nutrients, plant vigor and yield will decrease over time. Fortunately, it’s never too late to begin rebuilding garden soil and significant improvements can be made relatively quickly.