How do I interpret different soil pH test results?

Interpreting the results from soil pH tests requires knowing the specific requirements of the plants one has in mind. Readings of less than 6.0 indicate that the soil is acidic, which is the preferred condition for blueberries and rhododendrons. Neutral readings from 6.0 to 7.0 show the ideal condition for vegetables and flowers. Alkaline results, with a pH over 7.0, are preferred by lavender and cabbage. Therefore, it is advisable to make the plant grow under the specific pH requirements.

Carefully assess deviations. If blueberries have yellow leaves in soil with a pH of 6.5, they need more acidic conditions. For tomatoes with blossom end rot, add lime to neutralize the acidity at a pH of 5.8. I have a target range for each plant group in my garden plot for quick reference while testing.

Different levels of deviation necessitate different corrective actions. Minor corrective measures entail light applications of sulfur or lime. For major corrections, apply the amendments sparingly until the adjustment measures are safely in range over the period of the adjustment. I test every four weeks until I am in the adjusted measurement range. This procedure prevents overshooting of corrective measures, which can often cause other nutrient problems.

Soil texture is another factor to consider when interpreting the results of soil tests. Sandy soils react more quickly to pH changes than do clay soils. Organic matter buffers pH fluctuations. Seasonally record your results so that changes are easier to note. Your garden log becomes a valuable tool in maintaining perfect growing conditions year after year.

Read the full article: Soil pH Testing: The Complete How-To Guide