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PH Effect on the Growth of Bean Plants

The pH reading for soil is a measure of its acid-forming hydrogen ion activity. On the pH scale, which ranges from zero to 14, a reading below 7 is acidic and a reading above 7 is alkaline. Optimal bean growth occurs in soil with a pH between 5.8 and 6.5. When pH is outside of that range, beans may not grow properly.

  1. Manganese Deficiency

    • Beans raised in soil with pH higher than 6.5 may experience a manganese deficiency that impacts bean production, according to the University of Delaware Cooperative Extension.

    Iron Deficiency

    • Soil with a high pH could also cause iron deficiency in bean plants. This may interfere with proper photosynthesis.

    Aluminum Toxicity

    • Soil with a pH below 5 may encourage plants to take in a toxic amount of aluminum, which reduces root growth.

    Manganese Toxicity

    • Highly acidic soil can also lead to a toxic amount of manganese in bean plants, which will limit the uptake of other important minerals.

    Reduced Disease Resistance

    • Beans grown in soil with a pH lower than 5.8 have a greater incidence of disease.

    How to Adjust pH Level

    • Change the pH level gradually. Agricultural limestone or wood ashes will reduce soil acidity. Aluminum sulfate or peat moss can help reduce soil alkalinity.

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Growing Beans
  1. The Effect of Carbonated Water on Bean Plants
  2. The pH of Water & the Growth of Bean Plants
  3. The Effects of Light on the Growth of Bean Plants
  4. Does Iron Affect the Growth of Bean Plants?
  5. The Effect of Chelated Iron on Bean Plants
  6. Does Color Light Affects the Growth of Bean Plants?
  7. Elements Affecting the Growth of Bean Plants
  8. The Growth of Epicotyls & Leaves of Bean Plants
  9. The Effect of pH on Lima Bean Growth
  10. How to Label the Growth of My Bean Seed
  11. The Effect of Light Intensity on Bean Plants
  12. The Effects of Sunlight on Bean Plants

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