A healthy Irish lawn needs different things at different times of year. The calendar below gives you a practical month-by-month guide to what to do, tailored to the Irish climate rather than the UK-centric guides that dominate online. County Louth conditions are relevant throughout: maritime climate, generous rainfall, moderate temperatures, and heavier clay soils in many areas.
January
Status: Dormant. Grass is not growing in most years.
- Keep off the lawn when it is wet or frosty. Walking on frozen or waterlogged grass damages it.
- Check drainage. If the lawn is consistently waterlogged after rain, January is a good time to plan drainage improvements before the growing season.
- No cutting needed.
February
Status: Dormancy breaking. Mild spells may trigger early growth.
- In mild years, soil temperatures begin to creep up in late February. You may see some growth.
- If the ground is firm and dry, a single high cut (55-60mm) in late February can tidy the lawn and remove dead material.
- Check the lawnmower: blades, oil, spark plug, fuel.
- Towards the end of February, a light application of a slow-release lawn fertiliser can be made if growth has started. Do not fertilise dormant grass.
March
Status: Growing season beginning.
- First cuts of the year. Set the mower height high (50-55mm) for the first few cuts.
- Two or three cuts during the month in a normal Irish spring.
- If you plan to overseed, this is the last chance before summer. Soil temperatures need to be above 8 degrees for reliable germination.
- Apply a spring lawn fertiliser (high nitrogen) if you have not already.
- Begin watching for moss, which is most visible when the lawn starts actively growing.
April
Status: Strong growth. Weekly cutting underway.
- Move to weekly cutting from early April in most years.
- Start applying selective weed killer if you have persistent broad-leaved weeds (dandelions, plantain, clover). Do not apply on windy days or in advance of rain.
- Scarify if your lawn has significant thatch or moss, or if it is coming out of winter looking flat and tired. April is one of the two best months for scarifying in Ireland (September is the other).
- Aerate compacted areas with a garden fork or hollow-tine aerator.
- Apply a spring/summer lawn feed if you have not already.
May
Status: Peak growth season. Most demanding month.
- Weekly cutting, sometimes every five to six days in a warm wet year.
- Keep the cutting height at around 40mm. Do not scalp.
- Water during any extended dry period, particularly on sandy or free-draining soils. County Louth soils tend to hold moisture well but lighter soils will need watering after ten or more days without rain.
- Apply fertiliser if growth seems slow or the lawn looks pale. A mid-season feed lifts colour significantly.
- Check edges and trim as needed.
June
Status: Peak growing season continues.
- Weekly cutting maintained.
- Edging along paths, beds, and borders gives the lawn a finished look and is worth doing every two to three weeks.
- Watch for chafer grub damage (patches of turf that lift away from the ground like a carpet). If found, treat in summer before adults emerge.
- Continue watering in dry spells.
July
Status: Growth steady. Dry periods possible.
- Weekly cutting or every ten days if a dry spell slows growth.
- Do not lower the cutting height in dry weather. Longer grass is more resilient in drought.
- In dry summers, some yellowing of lawns in County Louth is normal and not a permanent problem. The lawn recovers once rain returns.
- Avoid applying fertiliser during a dry spell.
August
Status: Growth slowing towards the end of the month.
- Continue weekly or near-weekly cutting.
- Overseed bare or patchy areas from mid-August onwards. August and September are the best months for overseeding in Ireland because soil temperatures are high, rainfall is increasing, and competition from weed seeds is lower than spring.
- Apply an autumn lawn fertiliser (low nitrogen, higher potassium and phosphorus) from mid-August to harden the grass before winter.
September
Status: Autumn transition.
- Move to fortnightly cutting as growth slows.
- Scarify if thatch has built up through summer. September is the other optimal month alongside April.
- Overseed patchy areas if not done in August.
- Hollow-tine aerate and top-dress if compaction is a problem. This is the most important maintenance task for long-term lawn health and September is the best month to do it.
- Apply autumn lawn feed if not already done.
October
Status: Growth slowing significantly.
- Fortnightly cutting. Raise the cutting height slightly.
- Apply autumn lawn feed if you have not already (last chance for the year).
- Rake off fallen leaves regularly. A thick layer of leaves over the lawn blocks light, promotes moss, and can cause disease. This is particularly relevant for gardens near trees.
- Prepare for overwintering: remove any garden furniture that compacts the grass.
November
Status: Growth largely stopped.
- One or two cuts maximum if the grass is still growing and conditions allow.
- Continue raking leaves.
- Check drainage again if wet patches persist.
- Do not apply any fertiliser, weed killer, or lawn treatments from now until spring.
December
Status: Dormant.
- No cutting needed.
- Keep off the lawn in frosty or waterlogged conditions.
- This is a good time to plan any major lawn improvements for next year: drainage work, topsoil, turfing, or scarifying equipment.
Quick Reference: Key Tasks by Season
| Season | Priority tasks |
|---|---|
| Spring (Feb-Apr) | First cuts, spring feed, scarify if needed, overseed bare areas |
| Summer (May-Sep) | Weekly cutting, edging, watering in dry spells, mid-season feed |
| Autumn (Sep-Nov) | Scarify, aerate, overseed, autumn feed, leaf clearing |
| Winter (Nov-Feb) | Minimal: keep off wet grass, plan for spring |
For professional lawn care and grass cutting across Dundalk and County Louth, see our grass cutting service. For more on specific lawn tasks, read our lawn scarifying guide and how to cut grass edges.
