pH is important and a vital element to succeed in growing plants. When the pH of your solution is at the correct range that your crop requires, you get the maximum size and the best of health that your crops can possibly reach. This is why commercial farms measure pH. Some farms use manual meters that are dipped in water while some use automated sensors that are in the solution at all times. A crop that is grown in the correct pH range from the beginning of its life right to the point of harvest are very healthy and grow very huge.