Lawn Treatment Guide Scope of Works Site walk‑through & debris removal – clear stones, toys and branches before machinery starts. Set mower height & cut...
Professional lawn treatment in the UK — feeding, weed control, scarifying, aerating and overseeding — typically costs £200–£600 per year for a typical suburban lawn, spread across 4-6 visits through the growing season. A one-off renovation of a tired lawn (scarify + aerate + overseed) ranges from £200–£500; ongoing treatment programmes work out cheaper per visit.
This is different from mowing — lawn treatment focuses on the health and appearance of the grass itself. Companies like GreenThumb, TruGreen, LawnMaster offer national packages; local independent specialists are usually 20-30% cheaper.
The standard 4-treatment annual programme
- Spring (March-April) — feed and weed (selective herbicide + fertiliser). Triggers active growth and kills overwintering broadleaf weeds.
- Early summer (June) — feed only. Slow-release nitrogen for sustained growth into summer.
- Late summer (August) — feed and weed (if weeds returned).
- Autumn (October-November) — autumn feed (low-nitrogen, high-potash) to harden the lawn for winter resilience.
Programme cost £250-£550 per year for a typical UK suburban lawn (100-300 m²).
Typical UK lawn treatment costs
| Service | Typical price |
|---|---|
| Single feed and weed treatment | £60–£140 |
| Annual 4-treatment programme | £250–£550 |
| Annual 5-6 treatment premium programme | £400–£800 |
| Scarifying (remove thatch) | £100–£300 |
| Aerating (hollow-tine or spike) | £100–£250 |
| Overseeding | £80–£200 |
| Top-dressing (sandy loam) | £100–£300 |
| Full lawn renovation (scarify + aerate + overseed) | £250–£600 |
| Moss treatment (sulphate of iron) | £60–£140 |
| New turf laying (per m²) | £10–£20 |
Scarifying — the most-skipped treatment
Thatch (dead grass and moss between green blades and soil) builds up over time, creating a spongy mat that prevents water and nutrients reaching the roots. Scarifying mechanically removes thatch using a powered raker.
Best done in autumn (September-October) when grass recovers fastest. The lawn looks dreadful for 2-4 weeks afterwards, then comes back stronger and denser. £100-£300 per scarify; once a year is often enough for active lawns.
Aerating
Compacted soil (from foot traffic, mowing, kids playing) prevents oxygen, water and nutrients reaching grass roots. Aeration creates holes in the lawn surface to relieve compaction.
- Spike aeration — solid spikes pushed in. Quick, cheap, mild benefit.
- Hollow-tine aeration — removes plugs of soil. More effective for compacted ground, particularly when followed by top-dressing.
£100-£250 per aerate; once a year for actively used lawns, every 2-3 years for less-trodden lawns.
Overseeding and top-dressing
Overseeding spreads new grass seed onto the existing lawn to thicken thin areas and introduce hardier varieties. Best done after scarifying and aerating, when seed-to-soil contact is maximised. £80-£200.
Top-dressing applies a thin layer of sandy loam to level minor undulations and improve drainage. £100-£300. Only needed for lawns with clear surface unevenness or drainage problems.
Things people often miss
- Lawn improvement takes 1-2 years — a tired lawn won't transform from one programme. Year one establishes the baseline and treats weeds; year two shows real improvement; year three the lawn is consistently good.
- Mowing matters as much as treatment — over-mowing (too short) and infrequent mowing both damage the lawn. Standard guidance: never remove more than a third of the blade in one cut.
- Watering after treatment — many fertilisers need watering in within 24-48 hours to activate and avoid scorch. If the forecast is dry, sprinkle.
- Pet-safe products — many lawn treatments are safe once dry, but wet treatments are toxic to pets and children. Confirm "ready for play" times with the technician.
- Moss is a symptom, not a problem — moss thrives in compacted, shaded, poorly-drained lawns. Treating moss with iron sulphate kills the moss, but the moss returns unless underlying conditions are addressed.
- Annual programme provider switching — most national providers (GreenThumb, etc.) lock you into 12-month contracts. Read the cancellation terms before committing.
Frequently asked questions
Is a lawn treatment programme worth it?
For a lawn in moderate condition, yes — £250-£550 a year delivers a significantly better-looking lawn than DIY weed and feed at half the cost. For a lawn that's already excellent, ongoing programmes maintain it; for a very tired lawn, the first year sets the baseline rather than transforming.
How long after treatment can pets and kids use the lawn?
Typically 4-24 hours depending on product. Liquid herbicides need to dry (4-8 hours); granular products are usually safe immediately for children but recommend waiting 24-48 hours for pets to avoid ingestion of pellets.
Can I do lawn treatment myself?
Yes — DIY weed and feed (e.g. EverGreen Complete) is cheap and works reasonably well for routine maintenance. Specialist treatments (scarifying, hollow-tine aeration, professional fertilisers) are typically better with a hire-machine or pro-grade products that domestic versions don't match.
How much does a one-off lawn renovation cost?
£250-£600 for scarify + aerate + overseed combined, on a typical UK suburban lawn. Includes one-off feed application. Best done in early autumn for fastest recovery.
Why is my lawn full of moss?
Compacted soil, poor drainage, shade, or acidic soil (pH below 5.5). Treat the moss with sulphate of iron, then address the cause: aerate compacted areas, improve drainage, prune overhanging branches, or apply lime if the soil tests acidic.
What's the best time of year for lawn renovation?
Late August to mid-October — warm soil for seed germination, autumn rain to keep new grass moist, less competition from weeds. Worst time: midsummer drought (seeds won't germinate, existing grass stressed) or hard winter frost.
Want a local pro to handle this? A specialist lawn treatment service (independent local or national chain like GreenThumb / TruGreen) delivers consistent results year-round. Worth a 12-month commitment to see real change; one-off treatments rarely transform a lawn alone.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
