Spreading nitrogen and sulphur at the same time means more grass
Applying fertilisers containing nitrogen and sulphur means the grass uses nitrogen more effectively, you get more kgs of dry matter per kg of nitrogen that you apply
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Have early fertiliser requirements on farm by January to increase spring grass supply
8th Dec 2025
Writing about February and March fertiliser applications in December might seem premature but this first and second nitrogen (N) application timings are critical to maximise grass supply in the spring. A good deal of the time, the fertiliser is just not on the farm in time. The time it takes to get fertiliser delivered isn’t constant each year, some years the supply chain can’t cope resulting in longer delivery times.
Those farmers who apply N at the appropriate time in spring, are more likely to grow more grass in March and April. We recommend applying 50 – 75 kg N/ha of YaraVera Amidas (20 – 30 kg N/ha) for these early N applications. They should only be applied when you can travel with a tractor, and without any major rainfall event forecast in the next 48 hours and soil temperatures are above 5.5 degrees and rising.
The benefit of spreading this low rate of N early is a large increase in growth rates in March and early April. A grass yield response of 13 – 16 kg grass dry matter per kg N applied is typical at this rate applied in February. Many farms this year lost out on grass growth of between 500 – 1,000 kg of grass dry matter in this period because of delayed or missed applications.
On moderate to intensively stocked farms, it’s a false economy not having the fertiliser you should be applying up until the end of March on your farm by January.
Grassland agronomy advice
The latest grassland fertiliser and nutrition advice from the Yara agronomists.
Recent grassland webinars
Advice on managing fertiliser inputs on first cut silage crops this spring
Philip Cosgrave, Yara's Grassland Agronomist is joined by Nicola Ingram and Nigel Mills, Yara Area Managers for UK and Ireland, to discuss a range of topics to help inform farmers on how best to manage fertiliser applications this spring on silage crops.
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In this webinar Philip Cosgrave, Yara Grassland Agronomist and Aveen McMullan, Senior Agricultural Technologist at CAFRE provide an update on the Nutrients Action Programme (NAP) regulations relating to the use and application of inorganic fertilisers and an explanation of the requirement for fertilisation plans.
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Listen to the latest grassland podcasts
If you are short of time why not check out our bite-size podcasts for the latest thoughts on grassland nutrition.
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