The following is a hydroponics and grow lights introduction covering the basics of the systems and methods commonly used for growing plants using hydroponics based systems. Our hope is to give you enough information to get you started with evaluating the different systems and with choosing the right one for you.
Hydroponics systems include: Nutrient Film Technique (NFT); Drip (or Top) Watering; Aeroponic; Cloning; and Ebb & Flow (flood & drain) methods. Fundamentally, all systems feature a reservoir and some type of container for the plant(s) to grow in, such as pots, trays, etc. What separates them is how the nutrient mixture is delivered to the roots.
Media-based systems use some form of growing media or plant nutrients, which provide support for the roots. There is a greater selection of media-based systems to choose from to accommodate diverse plants and plant sizes. Water culture systems can be used either with or without growing media. These systems, however, require regular attention since growth rates are high. Abundant and high-quality fresh water and electricity must be readily available. Also, rapidly growing plants need to be maintained. Vines call for trellising and fruit and flowers must be harvested in a timely manner. Some common water culture systems are raft nutrient film practice and aeroponics.
There are three primary grow lights choices; Metal Halide, High Pressure Sodium (HPS), and fluorescent. Fluorescent grow lights gives off little heat, lower light output and are primarily used to start seedlings and cuttings. New T8 and T5 higher output systems are now offered that produce enough lumens to grow various plants to maturity. Metal Halide grow lights are green/blue/violet-oriented in the spectrum depending upon the Kelvin temperature, and is the superlative light when natural light is not available and particularly during the vegetative growth stages. High Pressure Sodium grow lights are red/orange-oriented in the spectrum and the superlative lamp for secondary or supplemental lighting and promotes budding, flowering and fruiting.
