Slurry and fertiliser deadlines 2026: avoid a costly mistake

In 2026 the slurry closed period began on Thursday 8 October, after ministers granted a one-week extension to 7 October for farmers who registered with the Department first. That extension has ended. Chemical nitrogen closed after 14 September. Farmyard manure has a separate 31 October deadline.

::: official-advice-banner Checked 11 October 2026 against the national rules, DAFM nitrates guidance and the ministerial extension announced on 25 September 2026. Confirm your own nutrient plan with your advisor. :::

Where this stands on 11 October 2026: the exceptional extension ended on Wednesday 7 October. The closed period is now in force; the extension applied only to farmers who registered with the Department in advance. Do not treat a contractor's message as permission to spread. The 2027 reopening dates below are the normal dates in the regulations, not a promise that every field will be suitable for spreading.

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This guide covers the standard national position. Your ACRES contract, derogation conditions or a local drinking-water measure may impose tighter rules.

What are the slurry and fertiliser deadlines for 2026?

The legal wording describes when application is prohibited. The table translates it into the last and first normal spreading days.

Solid, uninhibited urea products with at least 1% ureic nitrogen are also prohibited. Other permitted fertilisers remain subject to the dates and your nutrient allowance.

Which county zone is your farm in?

The slurry spreading deadline is the same in autumn, but reopening dates differ by county.

• Zone A: Carlow, Cork, Dublin, Kildare, Kilkenny, Laois, Offaly, Tipperary, Waterford, Wexford and Wicklow.
• Zone B: Clare, Galway, Kerry, Limerick, Longford, Louth, Mayo, Meath, Roscommon, Sligo and Westmeath.
• Zone C: Cavan, Donegal, Leitrim and Monaghan.

Zone C has the longest closure. Chemical nitrogen or phosphorus normally resumes on 15 February. Slurry and farmyard manure normally resumes on 1 February.

Do not confuse the spreading zone with a nitrates derogation map. They answer different questions. The zone controls closed-period dates. The derogation map helps determine whether an authorised holding is limited to 220kg or 250kg of organic nitrogen per hectare. Our 2026 nitrates derogation guide explains that separate test.

Was the slurry deadline extended in 2026?

Yes. Ministers allowed one exceptional week, through Wednesday 7 October, and it came with a condition most years do not have. That extension has now ended.

Ministers Heydon and Browne announced the extension on 25 September 2026. They cited the summer drought and the surge in grass growth that followed it. Spreading was permitted up to Wednesday 7 October. The closed period began on Thursday 8 October.

The condition: you had to register with the Department before spreading. Not after, and not by telling your contractor. Registration was by email to nitrates@agriculture.gov.ie or by phone to 053 916 3425, quoting your herd number.

If you spread under the extension without registering, you were spreading in a closed period as far as the rules are concerned.

Both ministers said local authority and Department inspectors would take a zero-tolerance approach to anyone spreading slurry or soiled water during the respective closed period.

What this tells you about next year

The regulations allow an extension between 1 and 15 October in exceptional circumstances, judged on weather, predicted grass growth, rain forecasts and farm conditions. It is a ministerial decision, not an entitlement.

The detail changes with the year. In 2026 it was one week plus a registration step; in 2023 it ran to 14 October across two separate decisions. So plan winter storage around the normal 30 September close. Check the current DAFM nitrates guidance each September for that year's decision, and read the conditions rather than just the headline date.

What buffer zones apply before the closed period?

Chemical fertiliser must stay at least 3 metres from surface water.

For slurry, farmyard manure and most other organic fertilisers, the usual minimum distance from surface water is 5 metres. That distance increases to 10 metres for the two weeks before and the two weeks after the relevant closed period.

For slurry before the autumn closure, use the 10-metre buffer from 16 to 30 September. The wider distance also applies for two weeks after your zone's slurry period reopens.

Other national organic-fertiliser distances include:

• 10 metres where land slopes by more than 10% towards surface water;
• 15 metres from exposed cavernous or karst limestone features;
• 20 metres from a lake shoreline or a turlough likely to flood;
• 25 metres from a small drinking-water well, spring or borehole; and
• 100 or 200 metres from larger drinking-water abstraction points, depending on the supply.

Local authorities can specify different distances around drinking-water supplies. Check any local notice. Five metres is not a universal answer for every water feature.

When is spreading prohibited even though the calendar is open?

An open date is only the first check. Organic or chemical fertiliser and soiled water must not be spread when:

• the land is waterlogged;
• the land is flooded or likely to flood;
• the land is snow-covered or frozen;
• Met Éireann forecasts heavy rain within 48 hours; or
• steep ground creates a water-pollution risk because of runoff routes, drains, soil condition or ground cover.

“Heavy rain” means rainfall meeting Met Éireann's yellow, orange or red warning criteria. You still need judgement below that threshold.

Check the field, forecast and tank before calling the contractor. If the field fails, postpone it and record why.

How can your phone prevent a deadline mistake?

Use your phone as a checking and record tool, not as the authority on the rules.

1. Set the remaining reminders. Note the normal 31 October farmyard manure deadline and your county's 2027 reopening dates. Check for official changes.
2. Save your zone with the reminders. Add the relevant January or February reopening dates. This avoids looking at a neighbouring county's date next spring.
3. Paste in the current rules. Ask an AI assistant for a field checklist. Do not ask it to recall the law.
4. Check Met Éireann before each job. Save a screenshot of the forecast and warning status with your spreading record.
5. Record the application. Note the date, parcel, material, rate, contractor and buffer. A voice note can become a table later.

Our guide to documenting water-protection work with your phone gives a simple evidence routine. Find recording options in our farm tools directory. If you use sensor-equipped equipment, the slurry sensor cost guide explains what the data can and cannot prove.

AI can organise dates, compare entries and flag a missing field. It cannot inspect the ground, know about a local exclusion area or approve a spreading decision. Keep the official source beside the checklist.

Spreading dates and stock declarations are separate jobs. Our fertiliser closing stock guide explains the 15 October filing deadline, including nil returns.

What records should you keep?

Required holding records cover land, crops, livestock, fertiliser needs, nutrient plans, soil tests, stocks and storage. Organic nutrient movements have separate DAFM requirements.

For each spreading job, keep a practical field record even when a particular app is not mandatory:

• date and time;
• field or LPIS parcel;
• material and approximate quantity;
• application method;
• weather and ground check;
• buffer distance used; and
• contractor docket or machinery record.

The record does not make a poor application compliant. It shows what happened and makes nutrient totals easier to check.

What happens if you miss a deadline or buffer?

Stop and contact your agricultural advisor promptly. Record the parcel, date, material, quantity, weather and how the error occurred. Do not alter a docket, delete a machinery record or create evidence after the event.

The outcome depends on the facts. Local authorities and DAFM can inspect compliance. A breach can affect scheme payments or lead to enforcement.

If pollution has entered or may enter water, seek immediate advice on limiting further harm and notifying the appropriate authority. This article is a planning guide, not legal advice.

Frequently asked questions

What is the slurry spreading deadline in Ireland for 2026?

The normal final day was 30 September 2026, but ministers extended it by a week. Spreading was permitted to Wednesday 7 October for herds registered with the Department in advance. The closed period began on Thursday 8 October and is now in force.

What is the fertiliser spreading deadline for 2026?

Chemical nitrogen or phosphorus can normally be spread up to 14 September. The closed period starts on 15 September. It normally ends after 29 January in Zones A and B, and after 14 February in Zone C.

How far must slurry stay from a watercourse in September?

The usual five-metre minimum increases to 10 metres for the two weeks before the slurry closed period. Use 10 metres from 16 to 30 September. Wider distances apply near lakes, wells, water supplies, karst features and certain slopes.

The bottom line

The normal chemical fertiliser and slurry deadlines have passed. Check the separate farmyard manure deadline, winter storage and your county's reopening dates. Verify any exceptional permission before acting. Keep your records together and let your advisor check the rules for your own holding.