plants need water for ...

plants need water for photosynthesis and general survival, and they get that water from the soil in which they grow. If the soil changes the pH of the water, then it will affect the pH of the water available to the plant. The plant brings that water into its cells, the pH of the water can affect the pH balance of the cells. So the pH of the water is just as important as the pH of the soil! Soil ph will not affect the irrigation methods or scheduling at all. you will get good information about the soil Ph http://www.plantea.com/pH.htm here and can see some remedies also.