Many longtime organic gardeners have plenty of phosphorous and potassium in their soil, but over time they become inorganic and start to do more harm

If you're in the process of building up your garden soil with organic matter, managing NPK can be a challenge. Here's what you neeed to know.

Here's how to determine your garden's soil texture type . . . and why it really, really matters.

At-home soil test kits are an inexpensive way to determine the pH and N-P-K levels of your garden soil. Here's what to do with the information they pr