How to Adjust the pH With Sulfur

Use a soil pH test kit to test the pH level of your soil. Read all instructions and warnings in the kit before completing the test, and follow the instructions when conducting the test. If your soil's pH is 7.5 or above, you can lower it using sulfur.

Measure the area of soil you want to apply the sulfur to with a measuring tape to determine the square footage of your garden.

Take a sample of your soil to your local county extension office. An official there will tell you what type of soil you have. Check the office's amendment charts to determine the correct application rate for the sulfur. Sulfur application rate tables can also be found in the "References" section below.

Water the soil with a garden hose until the top 4 to 6 inches are damp. Put on a pair of gloves to prevent the sulfur from coming in contact with your skin. Fill a drop spreader with elemental sulfur.

Spread the elemental sulfur over the surface of the soil at the recommended rate using the drop spreader. Spread the sulfur over the ground evenly in front of you as you walk backwards to avoid stepping in the sulfur and disrupting your spreading pattern.

Mix the sulfur into the top 4 to 6 inches of soil using a tiller. Mix the sulfur into the soil evenly. Water the soil as it dries to keep it moist over the next week.

Wait 2 to 3 weeks and retest your soil to determine if the pH has lowered. Consult your local extension office if the soil pH shows no signs of lowering after one month.