Potassium Thiosulfate: Fertigation and Foliar Use for Better Fruit Quality
Potassium thiosulfate delivers 36% potassium and 36% sulfur in a single liquid product, a combination particularly useful during fruit development, when potassium drives sugar accumulation and fruit sizing while sulfur supports the plant's broader metabolic and protein-building processes.
Its high solubility and compatibility with drip irrigation make it a practical choice for growers running fertigation systems on fruit orchards and high-value vegetable crops, where precise, split applications through the season are easier to manage than periodic granular broadcasts.
Because both potassium and sulfur demand rise sharply during fruit fill, timing applications to the flowering-through-fruit-development window generally gives the strongest response compared to earlier vegetative-stage applications.
As with other thiosulfate-based liquids, growers should confirm compatibility before tank-mixing with other fertigation inputs, since combining incompatible products in a drip system can cause precipitation that clogs emitters rather than delivering nutrients to the root zone.