What is SiLK slow-release potassium technology?

SiLK is a slow-release potassium and silicon technology used in Sierraform GT fertilizers.

It uses a slowly degradable matrix to release potassium and silicon progressively in the presence of moisture, helping extend nutrient availability over approximately 8 weeks.

Why potassium availability matters

Potassium is an essential plant nutrient involved in several important turf processes, including water regulation and enzyme activity.

Immediately soluble potassium sources become available quickly after application and can move through the rootzone with water, particularly in freely draining soils.

SiLK provides a slower-release source of potassium, helping maintain availability over a longer period.

How does SiLK work?

Potassium and silicon are held within a matrix made up of gradually degradable bonds.

When moisture is present, the outer layers of the matrix begin to break down and release potassium and silicon. The process then moves progressively inwards through the matrix.

This creates a gradual release pattern rather than making all of the nutrient available immediately after application.

How long does SiLK release nutrients?

SiLK is designed to release potassium and silicon over approximately 8 weeks.

The release rate is determined by the structure of the matrix, including its size and the strength of the bonds within it.

Moisture is required to initiate and maintain the release process.

Why use a slow-release potassium source?

A gradual potassium supply can help extend nutrient availability between applications.

This is particularly relevant where immediately soluble potassium may be more vulnerable to movement through the rootzone under rainfall or irrigation.

By releasing potassium progressively, SiLK provides a more sustained source within the fertilizer programme.

Designed for fine turf

SiLK is used within the granules found in Sierraform GT.

These small granules provide even distribution across closely mown turf and disperse quickly after application.

The SiLK release mechanism is based on the matrix itself rather than an external coating, so the gradual-release properties are not dependent on maintaining an intact coating.

Where is SiLK used?

SiLK technology is used in the Sierraform GT fertilizer range, where it contributes a slow-release source of potassium and silicon alongside the other nutrients in the formulation.