Whether you are growing hydroponically or in soil it is essential to provide the proper nutrients to your plants in order for them to thrive. Fortunately, to make it easier for the rest of us, scientific research has determined that plant food includes three important elements: Nitrogen, which is essential during the foliage growth stage; Phosphorus, which stimulates blooming and root growth; and Potassium, which promotes a healthy cell wall structure. Commonly referred to as the NPK rating and expressed using three numbers like (8-4-1), the rating can give you a general guideline about the potency of the fertilizer and how it will help you grow healthy plants.
HydroWarehouse has a great selection of hydroponic nutrients and soil fertilizers from established brands that are dedicated to producing quality plant growth products. Popular manufacturers like General Hydroponics and FoxFarm have developed nutrients for both soil and hydroponic growing. HydroWarehouse also carries a large variety of organic nutrients, including the new General Organics line and the popular fertilizers from Age Old Organics.