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Agronomy Team

Our experienced and qualified agronomists specialise in on-farm crop protection advice, on all arable and forage crops, to ensure efficient and targeted inputs produce optimal returns.

A full crop-walking service is provided by BASIS and FACTS qualified agronomists, which compliments the resources provided by our network of country stores. Our specialists are listed on the BASIS Professional Register and advice and recommendations are fully compliant with crop assurance schemes.

Our team of agronomists use their knowledge and experience to target inputs (be they agrochemical, fertiliser or seed) to specific situations to achieve full crop potential. Whether it is the latest SDHI cereal fungicide or brand new chemistry for use on newly sown leys, Wynnstay supply plant protection products from all the major manufacturers.

All our country stores have BASIS approved chemical storage facilities from where sprays can be collected. If a product is required that is not in stock, we can supply from our central chemical store.


t: 01939 210555 | m: 07990 578545

Email Simon | LinkedIn

After graduating from UCW Aberystwyth with BSc Hons in Agricultural Botany, Simon went on to achieve a PhD from Imperial College London, researching the Sclerotinia Diseases of Arable Crops.

His career began in 1984 on a field trials station in Wiltshire, before moving to the Pathology department of the National Institute of Agricultural Botany, Cambridge.

In 1990 Simon took on a more commercial role as a crop protection specialist covering Cheshire and North Shropshire.

Since joining Wynnstay in 2000, he has been responsible for the company’s crop protection activities and also fulfils the roles of Maize Product Manager and Silage Additive Product Manager.


Worcestershire and the Cotswolds area

m: 07866 125680

Email Tony 

Tony joined Wynnstay in 2009 and now works as an Animal Health Manager in the Three Counties region.

Alongside his AMTRA SQP qualification, Tony is also BASIS registered and provides advice on all forage crops including fodder beet, brassicas, maize, grassland, wholecrop cereals.

Tony has many years of experience in the agricultural industry having been a dairy farmer for over 30 years.

Cefin Evans FACTS

Ceredigion/North Pembrokeshire area

t: 01239 711084 | m: 07879 841673 

Email Cefin 

Cefin joined Wynnstay 15 years ago from Agtek (Kemira Fertilisers) where he trained as a technical Sales Representative.

Cefin is FACTS registered and specialises in advice for any size enterprise and for all types of systems - dairy, beef, sheep, arable and mixed farming.

Lawrence Couzens BSc Hons, BASIS, FACTS, BETA, NMP


m: 07766 404571

Email Lawrence

After graduating from Gelli Aur with HND and NVQ level 4 (agriculture and livestock management)

Lawrence then worked on farms at senior roles such as head stockman on 600 head suckler farm, head driver on 3000 acre farm before managing a 600 acre beef sheep and arable unit in Bridgend.

Lawrence gained a BSc hons in agri land management at UWE (Hartpury) and also attained his FACTS, BASIS – crop protection, nutrient management planning, conservation management, soil and water management.

Over the past 8 years Lawrence has been an agronomist and consultant with his last position as chief agronomy developmental agronomist with and imperial collage tech start up, focusing on artificial intelligent robotic drones.

Lawrence is able to give advice on all aspects of arable and forage farming along with some specialty crops including variety selection, fertilizer and crop recommendations.

Contact The Agronomy Team

Wynnstay's Agronomy Services

Crop Protection

Wynnstay’s Agronomy service offers practical and strategic advice on all aspects of crop management. We will provide the most cost-effective and efficient solutions by developing an understanding of specific customer requirements. The service will offer technical and strategic advice on all aspects of crop management. This will include advice on fertiliser planning, crop selection and crop husbandry to help improve on-farm profitability.

Wynnstay provides the most cost-effective and efficient solutions by developing an understanding of specific customer requirements.  This, in turn, will help to maximise output - whilst lowering production costs.

Grassland Crop Protection

Grassland management is often overlooked for new leys, but by prioritising weed control early during establishment, you will achieve cost-effective, long-lasting control, resulting in a better quality crop in the long term.

Correct product choice, an appropriate rate and timely application are crucial. ‘Clover-safe’ herbicides can be usefully employed. However, when there is a particularly challenging weed problem, it may be advisable to forget about saving the clover and use more effective ‘non clover-safe’ products. It is a straightforward process to re-establish clover at a later date. Early treatment not only allows you to get on top of weeds, but also allows the new sward to get a good, clean start without weed competition, so sown species persist for longer. The approach needs to be field specific in terms of the product recommendations, so talk to one of the Wynnstay agronomists, who can advise on the best approach for you.

Crop Nutrition Services

Wynnstay are able to offer a complete crop nutrition package from product supply through to fertiliser strategy and planning advice. The supply of product is fully supported by an expert advisory service — based on the bespoke needs of each customer. The Fertiliser Department, Agronomy Team and Arable Specialists can use their extensive technical knowledge to develop a fertiliser programme specific to each customers’ requirements. Wynnstay recognises the importance of analysing individual conditions to increase the efficiency of fertiliser – with the aim of maximising productivity and minimising expenditure.

A strategic approach requires in-depth examination and planning. Wynnstay’s team of specialists will use a number of methods to gather crucial insight to help make the best decisions on crop nutrition. This bespoke analysis will include an understanding of:

  • Soil analysis results
  • End use of the crop
  • Previous cropping and management
  • Environmental factors
  • Legislative requirements

Comprehensive Crop Nutrition Planning and NVZ Compliance

Wynnstay offer a comprehensive NVZ and nutrient management service using cutting edge software that generates accurate crop nutrition plans and field records. As well as producing field-specific Nitrogen recommendations, the software also takes into account Sulphur requirements and balances P and K off-takes or builds reserves. The fertiliser value of manures, slurries and other organic inputs will also be included in the calculations.

The reports generated are fully compliant with NVZ legislation.

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