General Soil pH Information & Tips
The pH of soil directly affects nutrient availability to plants. Plants thrive in different soil pH ranges, but readings outside 4 to 8 are uncommon. Some plant species are tolerant of wider pH ranges, but most prefer a neutral soil with pH levels falling within the 6 to 7 range.
Increasing Soil pH
A common practice is to apply finely ground agricultural limestone. Depending on your soil type, different amounts of limestone will be required to adjust the soil pH value.
Decreasing Soil pH
Adding organic material such as highly acidic sphagnum peat moss will lower soil pH. Introducing elemental sulfur (90 or 99% sulfur material) or acidifying fertilizers such as ammonium sulfate with repeated use can also reduce soil pH.
Recommended Soil pH Ranges
The plants listed in this guide represent commonly found species. Consult a local horticulture professional for more specific details on plants not found on this list. Click the images to view larger.
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