When it comes to healthy plant growth, potassium is one of the three essential nutrients (along with nitrogen and phosphorus) ...

Soil that is low in nitrogen, phosphorus, or potassium can result in a poor or sick plant yield. Fortunately, a special ...

Here's our guide to feeding your garden. Most plants need three major nutrients to thrive; nitrogen, phosphorous and potassium, which are generally known as NPK (their chemical symbols).