Most local garden centers have NPK fertilizer on the shelves, but what exactly is it? NPK is an acronym for the nutrients nitrogen (N), phosphorus (P), and potassium (K), the three nutrients that play ...

We may receive a commission on purchases made from links. Beans and a few other plants add nitrogen to garden soil, but most extract this nutrient, as well as phosphorous and potassium, because these ...

Fertilizer numbers explained: what they mean and what to look for lutavia / Getty Images Even if you make your own compost to feed your plants and amend the soil with plenty of organic matter, you ...