The Q&A Archives: High Ph Level In Blueberries

Question: My soil has a high PH, Blueberries will not grow well after a # of tries.
How do I get the PH level needed?

Answer: The most common method of lowering pH is to use aluminum sulfate according to the label instrucions. You will need to do this gradually to avoid shocking the plants. Additional long term measures would include using an acidic mulch such as pine needles or oak leaves, avoid using lime or wood ashes which raise pH, and test your soil regularly to monitor the situation. In the meantime, you might use a water soluble fertilizer developed for acid loving plants to keep the plants alive and if you water them, use rainwater or add vinegar (a couple of tablespoons to the gallon) to the water to make it slightly acidic. Finally, if your native soil is alkaline, you might consider making some raised beds for your blueberries since this would allow you to make a custom soil mix for them -- acidic, highly organic, and evenly moist yet perfectly drained.

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