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Soil sulfur is an essential amendment when gardening clay soils that receive little rain. It is used to lower or correct the soil pH. Soil bacteria turn sulfur into sulphuric acid, lowering the pH. We recommend the use of Tiger 90CR or a similar product. 

Per the manufacturer, Specifically formulated Tiger 90CR sulphur fertilizer (0-0-0-90) is designed to quickly degrade, disperse and convert to sulphate throughout the growing season. Research shows that Tiger 90CR sulphur converts to sulphate faster than other forms of elemental sulphur for season-long nutrition and high yields. Yearly applications of Tiger 90CR will improve soil sulphur levels and loss associated with soluble nutrients. Recommended use is every 3 months during the warm season, early spring, mid-summer, and fall are best. Warm temperatures and moisture are needed for the decomposition of sulfur.

Additional information


50 lbs, 6 lbs, 1 lbs