Passive kits and systems consist of hand or capillary-watering (also known as wick systems).
Hand-watering is exactly what it says – watering by hand. This method depends on how much effort the grower is willing to put in, but does not really offer much more than traditional fertilisation techniques.
Whilst capillary-watering can be achieved through a range of techniques such as using a valve from a reservoir, having pots that sit on a regularly watered capillary matting, sitting pots in a shallow reservoir, where the capillary action draws the solution up the media; or placing individual pots in trays or saucers that the solution is put into.
An example of this type of simple system is the PLANT!T GoGro.
For more information visit the GoGro website