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Product Focus
 
Evolution5
25-5-8 20kg
A high quality Spring lawn fertiliser with controlled release for upto 5 months

From £28.99
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Compound and Blended Fertilisers

You get what you pay for!

 
Granular fertilisers can be categorised into two main physical types; the compound granular fertiliser, where each granule contains all of the nutrients specified for that fertiliser in equal amounts and the blended granular fertiliser, which is essentially a mixture of several individual granular nutrient sources that are mixed together to give the required analysis.  A good analogy of a blended fertiliser is the multi-coloured sugar granules that children like on ice-cream!  These two physical types of fertiliser may contain the same total amounts of plant nutrients; so if we specified a fertiliser with an analysis of  9-7-7 (N-P-K), then 1 kilogram of compound granular fertiliser would contain the same weight of each nutrient as 1 kilogram of blended 9-7-7 fertiliser granules.
 
Blended granular fertilisers are inherently cheaper to produce than the compound granular equivalents, since manufacture is a simple process of selecting ready-made components and mixing them to achieve the final product.  In contrast, the production of a compound fertiliser involves much more complicated processes.  There are different methods of manufacturing compound granular fertilisers; for example,  one process starts with fine milling of the nutrient sources, which are combined with water to form a slurry that is put through a pelleting and drying process to produce a uniform granule suitable for the intended crop.
 
The cheaper blended fertilisers are fine for most agricultural purposes and can also achieve reasonable results in some outfield turf situations.  However, they can produce an uneven growth response in close-mown fine turf areas, due to scattering and spread of the individual nutrient granule components.  Although blended fertilisers are well mixed, we cannot guarantee that each grass plant will receive the same nutrients supplied in equal quantities.  With a compound granular fertiliser, each granule has the same analysis of N-P-K in equal amounts, which results in an even growth response.