Tips To Maintain PH Levels For Hydroponic Gardens

Hydroponic gardening (also known as soilless gardening) makes use of nutrient solution (prepared by mixing mineral based fertilizers with water) to grow and yield. Gravel, coconut husk, rock wool and many such inert mediums too are used (instead of soil) in this form of gardening. Among the most important thing a hydroponic gardener or grower must know is how to adjust the right pH levels for desired plant growth and produce.

If you are new to this practice, you should know the meaning and use of PH buffers and pH meter as well as the tips to maintain the right pH levels. Surprisingly, this essential task if often overlooked by the growers. Here is a discussion that provides detailed information in this regard.

Importance of PH Level:

Hydroponic plants must absorb desired quantities of different nutrients from the mineral water solutions for proper growth. High or low pH levels may prove to be disastrous. In general, these plants demand pH levels between 5.5 and 6.5 (a slightly acidic range), though few exceptions are cabbage (6.5-7.5), onion (6.5-7.0) and pineapple (5.0-5.5).

How To Maintain The Level:

The first step is to measure the pH level of the solution with the help of a pH meter. Paper test kits and liquid pH test kits are also available for this purpose, but a digital pH meter can produce fast and more accurate results.

Once you obtain the pH value, the next step would be to choose the best pH buffer that should be added to obtain the right level. Two types of buffers can be found:
• pH Down: Used when pH level is above 6.5 (for the plants demanding the pH range 5.5-6.5). The buffer will bring down the pH level.
• pH Up: Used when pH level is below 5.5 (for the plants demanding the pH range 5.5-6.5). The buffer will raise the pH level.

One good example of ingredients used in pH down buffers is phosphoric acid. Potassium hydroxide is among the best ingredients used for pH up buffers. Add the required buffer according to the manufacturers instructions and make sure to use pH meter to adjust the value to the optimal level. Remember that special precautions must be taken, as these buffers may cause burns or skin issues.

Choosing Right Buffer:

When selecting a pH buffer, you must take into account some important things like:
• Water Quality: Usually water is neutral at pH value of 7, but if it is already acidic or alkaline in nature, the buffer must be selected accordingly.
• Type of Plant: Every plant has its own internal pH range that must be known in advance.

Temperature: The general temperature range of a hydroponic garden must be assessed, as it can affect the nutrient uptake. Presence of microbes and use of inert medium are other important things.

It is also recommended to use pH meter to measure the pH level regularly, especially after the water in recycled. By following these steps, you can definitely add to the yield of your garden.