Making granules work for you

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GRANULES are clever little particles.

The carrier of active ingredients, they can make all kind of things happen – and we should know as we produce them!

Contract manufacturers and packers for the agrochemical and general chemical industries, Grotech Production Ltd has been in the  business of impregnating granules, as well as producing bespoke powders and liquids, for the last 30+ years.

Granules are usually used when a delayed or controlled delivery of an active product like a pesticide, herbicide or soil improver is required.

While we don’t make the basic granules themselves, we work closely with our customers to select the right granule for the job based on what they need it to do, its absorption capacity and, of course, its cost.

We then set about making them ‘active’ by spraying them with a liquid containing the key ingredients. Sometimes the active ingredients soak into the granule and are gradually washing out of it while at others they are carried on the outside and subsequently rinsed off. Either way, formulating the liquid in such a way that consistent absorption or adhesion is achieved is key.

Other important steps in the production process of granules can include:

  • Adding a powder to protect them from moisture and from becoming sticky;
  • Using a drying agent
  • Sieving out any larger granules which might develop during manufacture.

Grotech’s granules are as they should be – uniform in size, dustfree and flow easily when packed. If you’d like us to make granules work for you, contact us on 01405 761746 or email

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