Most plants do well in soil with a pH of 6.5, slightly acid.
pH Values) . However, rhododendron, camellias, azaleas, blueberries, ferns,
spruce, pines, firs, and red cedar prefer soil with a pH of 4.0 to 5.0. Pines,
firs, holly, daphne, spruce oak, birch, willow, rhododendron, alder, and red
cedar grow well in soil with a 5.0 to 6.0 pH. Soils with a pH of 6.0 to 7.0 will
grow maple, mountain ash, pansy, asters, peaches, carrots, lettuce, pines, firs,
alder, and red cedar. Beech, mock orange, asparagus and sagebrush tolerate soils
with a pH 7.0 to 8.0. Above 8.5 the soil is too alkaline for most plants and
soil with a pH less than 3.5 is too acid. Each soil layer may have a different
To determine soil pH, a universal indicator or pH paper can be used. Put a
small amount of the soil to be tested in a clear or white container. Do not
touch the sample. Pour a small amount of universal indicator over the soil.
Match the color of the indicator with the pH color chart. If using indicator
paper, pour a small amount of water on the soil sample. Touch the indicator
paper to the sample and match to color of the paper to the pH color chart.
Soil pH can be raised, making the soil less acidic and more alkaline, by
adding lime to the soil.
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