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Controlled Release Nitrogen Fertilisers

Why shouldn’t I use cheap agricultural fertiliser on my lawn?

Using agricultural fertilisers, such as the lawn fertilisers available from retail stores, results in an over-abundance of nutrient during the initial fourteen days after application without the longevity required sustaining optimal growth patterns.

This type of process results in accelerated turf growth, causing excessive clippings and weak turf that is susceptible to pest and disease damage. Once nutrients are exhausted and reapplication does not occur when required, a weakened turf develops. These budget products also do not contain some of the critical trace elements required for healthy turf growth.

Why should I use a Controlled Release Nitrogen product?

The use of a Controlled Release Nitrogen (CRN) source has proven to be a cost effective strategy to optimise soil nutrition without the need for fertiliser applications every four weeks during the growing season. In sand profiles, where nutrients are more difficult to retain, the result is leaching of nutrients out of the reach of the turfgrass, often into areas where they are not needed or wanted.

What CRN Blends does Oz Tuff offer?

Oz Turf Turf offers their customers access to the same professional CRN Fertilisers used to by professional turf managers and growers. The range of controlled release nitrogen fertilisers available ensures there is a product that meets the environment and turf type you have.

Control Release Nitrogen Fertiliser Blends

The Controlled Release Nitrogen blends offered by Oz Tuff Turf help maintain a consistent growth habit for up to twelve weeks, reducing mowing frequency, clippings and potential pest problems.

Features include:

• A controlled and more uniform release maximises nutrient uptake efficiency
• Minimal fertiliser loss due to leaching and volatilisation.
• Harder, more durable coating resists breakage during handling and application.
• Free flowing product is easier to handle and apply.
• All trace elements required to sustain healthy turf growth

What fertiliser should I use?

The following application ratios have been developed by Oz Tuff Turf. This application regime has been developed using the Nitrogen (N) to Potassium (K) ratio of the CRN fertilisers. 

The N to K ratio simply refers to the relative relationship between these two primary nutrients, rather than the specific number of kilograms of each in a fertiliser blend.

Establishment ratio

Apply an establishment NPK ratio (2:1:1) such as Starter (18.10.9) when:

• The turf has just been laid
• After renovation work such as scarification.
• The turf to be fertilised is in poor condition

Oz Tuff Turf also offers an 18.10.9 Starter fertiliser that is coated with a pre-emergent herbicide called Ronstar + Starter 18.10.9. This product will safely control grass weeds from emerging whilst your turf gets established as well as giving your turf the vital nutrients needed during establishment.

High Nitrogen ratio

Apply high Nitrogen to Potassium ratio fertiliser (2:1 or higher) such as Maintenance (24.2.9) when:

• The turf to be fertilised is in overall good condition
• The desired result is consistent and/or accelerated top growth
• Applying in spring when no fertiliser was applied in winter

Balanced ratios

Apply 1:1 Nitrogen to Potassium ratios such as Balance (22.0.18) when:

• Turf is in good condition and general maintenance is desired
• Stressful periods such as high traffic and wear situations
• A reduction in top growth is desired

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