What is PH?

pH is a scale to measure the acidity or alkalinity of a solution. Technically it is about the concentration of hydrogen ion. The pH scale runs from 0 to 14 with 0 being the most acidic, 7 being neutral, and 14 being the most alkaline or basic.

When using a pH scale it is important to know that the decimal points really count. The pH scale is a logarithmic scale which means that for every one point of pH, the concentration changes by a factor of ten.

Example: A pH of 6 is ten times more acidic than a pH of 7.

PH chart
ph scale

What’s the Best pH Level for My Plants?

  • Below 4.0: Root Damage
  • 4.0 to 4.9: Nutrient Leaching
  • 5.0 to 5.9: Good pH Level
  • 6.0 to 6.5: Ideal pH Level
  • 6.6 to 7.0: Acceptable pH Balance
  • 7.1 to 8.5: Poor Nutrient Uptake
  • Above 8.5: Root Damage

What do these terms mean?

Hydroponic Abbreviations

Check if your plants are in the comfort zone.

The chart allows you to check if your plants get all the nutrients necessary for their development or if they are waiting for a specific element
The shortcomings begin when an item becomes available at least 60% of the plant.

You’ll notice that plants grown in soil or compost need a pH less acid than those grown in hydroponics or coco.