A mineral that lowers the pH of alkaline soils and is great for acid loving plants such as blueberries, rhododendrons, azaleas, and camellias.
Available in 5 lb bags at your local independent garden center or hardware store in
WA, OR, CA, ID, AR, UT, TX, CO, NV, MT, WY
Just a reminder… Gardening can be a dirty business! We recommend using gardening gloves and washing your hands afterwards. Use with adult supervision and store in a dry area away from kids and pets.
We highly recommend that you have your soil tested first before adjusting the pH. This allows you to know what your baseline pH is, as well as what type of soil you have. The optimum pH for most plants is between 6 and 7. This range allows for the best plant uptake of nutrients from the soil and is the best for beneficial soil microbes. The type of soil you have also impacts how much sulfur is needed to successfully change the pH to the desired range.
How to test soil: Get samples of your soil by going out into the area and taking several samples along the edges and center. Then, send these away for an official soil analysis. If you don’t know where to send your soil for analysis, contact your local county extension agent. This analysis will also tell you what type of soil you have and other nutrient information along with the pH. There are also home test kits that are available to check pH.
Amount of Sulfur Required to Lower a Given pH to 6.5 for Different Soil Types.
Amount is in lbs. / 100 sq. ft. (10 ft. x 10 ft.)
| If pH is: | Sandy Soil | Clay Soil |
|---|---|---|
| 8.5 | 3.5 – 4.5 | 4.5 – 6.0 |
| 8 | 2.5 – 3.5 | 3.5 – 5.0 |
| 7.5 | 1.0 – 1.5 | 2.0 – 2.5 |
For general garden use and for use when planting new lawns, Whitney Farms® Granulated Sulfur is best applied 1 or 2 weeks before planting and feeding. Follow the recommendations provided to determine the amount required.
For shrubs, gently work up the top layer of soil, (without damaging roots) and mix Whitney Farms® Granulated Sulfur into the soil. Water thoroughly.
For established lawns, no more than a maximum of ½ lbs./100 sq. ft. should be used. If more is required, applications should be made a few months apart.
KEEP OUT OF REACH OF CHILDREN
Caution: May cause eye and skin irritation. Avoid contact with eyes and skin. If in eyes, flush eyes with water for a minimum of 15-20 minutes. If on skin, wash with soap and water. If irritation persists contact a physician.
Derived from: elemental sulfur. Not for use in organic gardening.
KEEP OUT OF REACH OF CHILDREN
Caution: May cause eye and skin irritation. Avoid contact with eyes and skin. If in eyes, flush eyes with water for a minimum of 15-20 minutes. If on skin, wash with soap and water. If irritation persists contact a physician.
