Liverpool, England

Best weekend slot

Sunday midday–2pm

Verdict: Good

ground soft — 62mm rain over the last week

Next mow

Tomorrow 8am–5pm

Verdict: Good

ground soft — 58mm rain over the last week

How you feel about mowing

Sensible middle ground.

Petrol or battery. The baseline.

The next 10 days

Column height is how mowable the day is; the lighter band is the best stretch within it. The line is soil temperature at 6cm.

9°C — seeding

Soil at 6cm 16.8°C cooling to 14.4°C

Wednesday 2 September: Marginal. No — 1.1mm of rain falling.

Wednesday 2 SeptemberConfident

No — 1.1mm of rain falling.

Poor:Grass wetness
Grass wetraining now
Marginal:Ground firmness
Ground soft in places38mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.89
Good:Temperature
Temperature15°C
Good:Wind
Wind light11 km/h

Limiting factor:grass wetness

Thursday 3 September: Good. 8am–5pm — ground soft — 58mm rain over the last week

Thursday 3 September · 8am–5pmConfident

8am–5pm — ground soft — 58mm rain over the last week

Good:Grass wetness
Grass dryrain earlier today
Marginal:Ground firmness
Ground soft58mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.97
Good:Temperature
Temperature18°C
Good:Wind
Wind light19 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:ground firmness

Friday 4 September: Good. No — 1.2mm of rain falling.

Friday 4 SeptemberConfident

No — 1.2mm of rain falling.

Marginal:Grass wetness
Grass drydried off since a shower 3 hours ago
Poor:Ground firmness
Ground saturated53mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.84
Good:Temperature
Temperature17°C
Good:Wind
Wind light19 km/h

Limiting factor:ground firmness

Saturday 5 September: Good. No — ground soft, 69mm rain over the last week.

Saturday 5 SeptemberConfident

No — ground soft, 69mm rain over the last week.

Good:Grass wetness
Grass dryrain earlier today
Poor:Ground firmness
Ground soft69mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.79
Good:Temperature
Temperature15°C
Good:Wind
Wind light13 km/h

Limiting factor:ground firmness

Sunday 6 September: Good. midday–2pm — ground soft — 62mm rain over the last week

Sunday 6 September · midday–2pmReasonably confident

midday–2pm — ground soft — 62mm rain over the last week

Marginal:Grass wetness
Grass dryrain earlier today
Poor:Ground firmness
Ground soft62mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.95
Good:Temperature
Temperature16°C
Good:Wind
Wind light17 km/h
Sociable hours
Fine by the neighboursstarts once the dew has burnt off

Limiting factor:ground firmness

Monday 7 September: Good. 8am–2pm — ground soft — 56mm rain over the last week

Monday 7 September · 8am–2pmReasonably confident

8am–2pm — ground soft — 56mm rain over the last week

Marginal:Grass wetness
Grass dryrain earlier today
Poor:Ground firmness
Ground soft56mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.77
Good:Temperature
Temperature15°C
Good:Wind
Wind light21 km/h
Sociable hours
A bit early or late, but finestarts when it stops being antisocial

Limiting factor:ground firmness

Tuesday 8 September: Good. No — 0.5mm of rain falling.

Tuesday 8 SeptemberReasonably confident

No — 0.5mm of rain falling.

Poor:Grass wetness
Grass dryrain earlier today
Poor:Ground firmness
Ground soft60mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.76
Good:Temperature
Temperature14°C
Good:Wind
Wind light20 km/h

Limiting factor:ground firmness

Wednesday 9 September: Good. No — 2.9mm of rain falling.

Wednesday 9 SeptemberReasonably confident

No — 2.9mm of rain falling.

Marginal:Grass wetness
Grass drydried off since a shower 5 hours ago
Poor:Ground firmness
Ground saturated76mm rain over the last week
Good:Growth
Growing steadilygrowth potential 0.49
Good:Temperature
Temperature12°C
Good:Wind
Wind light20 km/h

Limiting factor:ground firmness

Thursday 10 September: Good. No — 0.1mm of rain falling.

Thursday 10 SeptemberLow confidence this far out

No — 0.1mm of rain falling.

Good:Grass wetness
Grass dryno rain since Wednesday
Poor:Ground firmness
Ground saturated73mm rain over the last week
Good:Growth
Growing steadilygrowth potential 0.49
Good:Temperature
Temperature12°C
Good:Wind
Wind light6 km/h

Limiting factor:ground firmness

Friday 11 September: Good. No — 0.5mm of rain falling.

Friday 11 SeptemberLow confidence this far out

No — 0.5mm of rain falling.

Good:Grass wetness
Grass dryrain earlier today
Poor:Ground firmness
Ground saturated65mm rain over the last week
Good:Growth
Growing wellgrowth potential 0.53
Good:Temperature
Temperature10°C
Good:Wind
Wind light9 km/h

Limiting factor:ground firmness

Soil temperature

15.3°C60°F

at 6cm — germination depth

Cooling over the next 11 days.

Seeding conditions are open — soil is 15.3°C at 6cm and holding above 9°C.

Almost every UK and Irish lawn is a ryegrass and fescue mix, whether it was sown or turfed. We assume that, and use9°C as the seeding threshold.

I know what grass I have

The differences are small. Ryegrass is the quickest off the mark; bluegrass is the slowest and wants the warmest soil. Everything else sits between.

Soil temperature at 6cm for reliable germination. Sources onthe method page.
SpeciesSoil tempDays
Perennial ryegrasslikely yours8°C5–10
Red / chewings fescuelikely yours8–10°C10–14
Tall fescue10–12°C10–14
Browntop bentColonial bentgrass10–12°C14–21
Smooth-stalked meadow grassKentucky bluegrass12–13°C14–28

What this means right now

  • Good: Seeding window open

    Seeding conditions are open — soil is 15.3°C at 6cm and holding above 9°C.

  • Worth watching: Ground still soft

    53mm rain over the last week. A mower will mark it, and a ride-on will rut it.

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Forecast from Open-Meteo, refreshed hourly. Soil temperature is modelled, not measured — how that works and where the thresholds come from.