Hydroponic cultivation need not be complex or expensive, and requires only a little more equipment than indoor growing using soil.
Hydroponic growing differs very little from soil growing. The plants grow and flower in the same light cycle and are fed the same nutrients – nitrogen, phosphorus and potassium (N-P-K,
plus micro-nutrients and trace elements). The main difference is that hydro plants root and grow in a neutral medium which, unlike soil, has no nutrients of its own.
Hydroponic nutrient is water soluble and is immediately available to the plants when applied to the growing medium, while organic nutrients must be broken down by bacteria in order to enrich the soil to which they are added.
Aside from the indoor basics of light(s), timer, fans and air exchange (all of which are required for indoor soil growing, of course), hydroponic growers will require two meters for testing the nutrient water they give to their plants.
In addition, hydro cultivation will require a hydroponic growing medium, such as rock-wool (ideal for starting seeds and clones) or expanded clay-balls (a re-useable medium and an excellent second stage for plants that start in rock-wool), and hydroponic nutrient for the growing and the flowering stages.