Mastering pH with Bluelab
When the pH is slightly acidic most nutrient elements are available to a plant.
Slightly acidic range:
Hydroponic solutions: between 5.5 pH and 6.3 pH
Soil crops: between 6.2 pH and 7.2 pH
Individual crops have their own preference for pH values. That is, they do best at certain pH levels.
Whatever food solution you use, keep your pH in a fairly tight band. Consistent balance gives consistent growth.
It’s not just the nutrient mix... it’s the right pH that delivers the food.
Accurate pH readings in solutions with a ppm (500 Scale) of less than 250ppm [0.5 EC] can be challenging to obtain, and require the pH probe to be extremely well maintained and in excellent condition. For this reason Bluelab recommend that for general applications the ppm of the solution being measured should be greater than 250ppm (500 scale). If pH measurements in solutions of less than 250ppm are required then Bluelab recommend that guild lines for measuring pH in low ionic strength solutions be followed.