PH in Passive Hydroponics

Passive hydroponics refers to growing in pots full of a medium such as perlite or greenmix or to hand watering rockwool slabs. Normally, for this type of cultivation, it is recommended that the grower make up a large container of nutrient at a time. A 200 litre plastic drum is an ideal container. Once this is made up to the correct strength (conductivity), the pH can be checked and adjusted to the ideal level of 6.




A careful note should be made of the exact amount of pH Up or Down that is added at this time. A good pH can be used for this because although the pH measurement takes longer than with a meter, it only needs doing occasionally in passive systems. The nutrient solution in the drum should remain quite pH stable and can be applied to the plants as needed.

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Passive Hydroponics (Pot Culture)

Pot culture is the simplest form of hydroponics and involves the use of an inert medium such as perlite or greenmix in a plastic pot in place of soil. Despite the ease of using this system, do not make the mistake of under-estimating it. Incredible results have been achieved with flowering plants and vegetables and it is an ideal first step away from all the problems of soil.




If you are using pot culture for foliage plants only, you will be well suited with a single pack nutrient solution such as Formulex. However, if you wish to grow flowers or vegetables, you should consider using a twin or triple pack nutrient solution such as Optimum, Power Gro, Ionic or GH Flora range.

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