Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.
It checks today's price at every store, compares the alternatives and answers in about a minute.
Greenway Biotech Potassium Sulfate is a solution-grade 0-0-53 fertilizer with 17% sulfur and no nitrogen or phosphate. It supplies potassium as sulfate rather than chloride, which matters for chloride-sensitive crops like strawberries and processing tomatoes. It dissolves fully, so it works in fertigation and hydroponic recipes as well as soil applications. Gardeners with a soil test showing low potassium are the main audience; it is a single-nutrient corrective, not a complete feed.
Availability unknown
As an Amazon Associate, Deal.ai earns from qualifying purchases.
Also available at
Store links may earn us a commission.
Lowest price we've seen: $9.89 on Nov 11 at Amazon. Tracked across 1 store since Nov 11.
Rated 4.6 out of 5 from 49 ratings. Buyers value the high analysis and full solubility, and several use it to correct potassium without adding chloride.
Greenway Biotech Potassium Sulfate 0-0-53 is a solution-grade fertilizer made of potassium sulfate (K₂SO₄). It guarantees 53% soluble potash (K₂O) and 17% sulfur. It contains no nitrogen or phosphate.
It is used where a soil test shows low potassium. Gardeners weigh it and work it into vegetable beds, place it around fruit trees, or spread it on established lawns at no more than 1.89 lb (856 g) per 1,000 sq ft at a time. It supplies potassium as a sulfate rather than a chloride. California's processing tomato guideline prefers potassium sulfate over potassium chloride. Its strawberry guideline avoids potassium chloride where sodium and chloride are high.
Hydroponic and fertigation growers use it as one of the potassium sources in published university recipes. Dissolve it completely. Keep its concentrate apart from calcium concentrates such as calcium nitrate, because calcium and sulfate form gypsum. The product page gives amounts per plant, per tree, per 1,000 sq ft of lawn and per gallon, with a calculator.
