The relationship of Ph and nutrients PPM is found in the chart in the FAQ section that shows the different nutrients available to the plant at different Ph levels.

As the plant ages every 7-10 dayâ??s the cycle of life changes and the nutrient needs of the plant changes. This is more evident in Hydroponics then in dirt growing because hydroponics does not have the same buffers that soil has. Yes you can use special microbes and live bacteria in hydro but that is beyond the experience of most growers and can be a pain in the ass.

So as the plant matures the Ph will raise and fall with the cycle of life too as it seeks out different minerals for that cycle of life as well. Hydroponics requires you to be almost obsessive about watching the Ph range of your plants.

Ph is more of a balance act then your PPM is so I would worry more about Ph then PPM. The PPM will change with in 24 hours of feeding your plants due to the mineral they take out and others they leave and even a third that the plant produces and discards back into your water. This will also change your PPM level.

Just remember that the PPM is only accurate when you mix it. Once you give it to the plant it will change on you and you no longer know what minerals are present and what the plant has added.


This week's show is all about nutrients and last weeks was Ph and nutrients you may find some use full information there as well if you want to know more.