TR25, Isles of Scilly
Mowing
When you can next cut it, and the best slot this weekend.
Current conditions · 10pm, this hour
Not now — it’s dark
- Grass
- soaked
- Ground
- firm
- Rain
- 0.9 mm
- Temp
- 13°
- Wind
- 31 km/h
Forecast for this hour, not a measurement.
Best weekend slot
Sunday 10am–6pm
Verdict: Prime time
ground firm — 58mm rain over the last week, soil texture assumed
Next mow
Tomorrow 10am–11am
Verdict: Prime time
grass slightly damp — dry again after a shower
The next 10 days
Each row is a day, morning on the left. The more solid a block, the more of the forecast runs agree you can mow. Open a day for the hour-by-hour forecast behind it.
Tuesday 20 October: no hours worth using. No — 0.9mm of rain falling.
Tuesday 20 October, hour by hour 5am 6am 7am 8am 9am 10am 11am midday 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm Chance — — — — — — — — — — — — — — — — Verdict Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Already gone Rainchance · · · · · · · · · · · · · · · · Rainmm · · · · · · · · · · · · · · · · Grass · · · · · · · · · · · · · · · · Ground · · · · · · · · · · · · · · · · Temp · · · · · · · · · · · · · · · · Windkm/h · · · · · · · · · · · · · · · · Daylight · · · · · · · · · · · · · · · · Growth: growing slowly (growth potential 0.31). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Tuesday 20 OctoberConfident
No — 0.9mm of rain falling.
Limiting factor:grass wetness
Wednesday 21 October: 6 hours worth using. 5pm–7pm — breezy — 32 km/h
Loading the hour-by-hour forecast…
Growth: growing slowly (growth potential 0.27). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Wednesday 21 October · best slot5pm–7pmConfident
5pm–7pm — breezy — 32 km/h
Also mowable today: 2pm–4pm, midday–1pm, 10am–11am — each at its best hour
Limiting factor:wind
Thursday 22 October: no hours worth using. No — 0.1mm of rain falling.
Loading the hour-by-hour forecast…
Growth: growing slowly (growth potential 0.35). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Thursday 22 OctoberConfident
No — 0.1mm of rain falling.
Limiting factor:grass wetness
Friday 23 October: 5 hours worth using. 9am–2pm — grass dry — rain earlier that day
Loading the hour-by-hour forecast…
Growth: growing slowly (growth potential 0.25). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Friday 23 October · 9am–2pmConfident
9am–2pm — grass dry — rain earlier that day
Limiting factor:grass wetness
Saturday 24 October: no hours worth using. No — 1.8mm of rain falling.
Loading the hour-by-hour forecast…
Growth: growing steadily (growth potential 0.39). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Saturday 24 OctoberReasonably confident
No — 1.8mm of rain falling.
Limiting factor:grass wetness
Sunday 25 October: 8 hours worth using. 10am–6pm — ground firm — 58mm rain over the last week, soil texture assumed
Loading the hour-by-hour forecast…
Growth: growing slowly (growth potential 0.29). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Sunday 25 October · 10am–6pmReasonably confident
10am–6pm — ground firm — 58mm rain over the last week, soil texture assumed
Limiting factor:ground firmness
Monday 26 October: no hours worth using. No — grass wet, wet underfoot, 5 hours after the rain.
Loading the hour-by-hour forecast…
Growth: growing steadily (growth potential 0.42). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Monday 26 OctoberReasonably confident
No — grass wet, wet underfoot, 5 hours after the rain.
Limiting factor:grass wetness
Tuesday 27 October: 3 hours worth using. 3pm–6pm — grass slightly damp — dry again 5 hours after a shower
Loading the hour-by-hour forecast…
Growth: growing steadily (growth potential 0.36). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Tuesday 27 October · 3pm–6pmReasonably confident
3pm–6pm — grass slightly damp — dry again 5 hours after a shower
Limiting factor:grass wetness
Wednesday 28 October: 8 hours worth using. 10am–6pm — rain earlier that day, ground firm
Loading the hour-by-hour forecast…
Growth: growing steadily (growth potential 0.39). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Wednesday 28 October · 10am–6pmLow confidence this far out
10am–6pm — rain earlier that day, ground firm
Limiting factor:none
Thursday 29 October: 10 hours worth using. 8am–6pm — ground firm — 58mm rain over the last week, soil texture assumed
Loading the hour-by-hour forecast…
Growth: growing slowly (growth potential 0.33). Enough to be worth cutting. Growth decides whether a cut is wanted, not how well it will go, so it is not one of the rows above and does not move the chances.
Thursday 29 October · 8am–6pmLow confidence this far out
8am–6pm — ground firm — 58mm rain over the last week, soil texture assumed
Limiting factor:ground firmness
good to go touch and go dark, frost or snow already goneFainter means fewer forecast runs agree.
Growth
How fast it is growing, and when it will need cutting again.
31%Growing slowly
Of the fastest this grass could grow. The turf-industry measure, from today's temperature and day length.
Growing slowly — roughly 1.1mm a day. It will not put on enough to need cutting within the next 10 days.
Held back by both temperature and short days — 10.5 hours of daylight at 13°C.
- Over the next 10 days
- about 12mm of leaf
- Next cut due
- not within the next ten days
This only knows temperature and day length. Feeding, watering, shade and cutting height all move it, so treat it as a rough guide.
Worked out from the PACE Turf growth potential model and day length —how and why.
Seeding
Soil temperature at germination depth, and when the window opens.
Soil temperature in TR25, Isles of Scilly
15.2°C59°F
at 6cm — germination depth
Seeding conditions are open — soil is 15.2°C at 6cm and holding above 9°C.
Cooling over the next 10 days.
An independent estimate from air temperature gives 13.1°C, 2.1°C away. Treat the figure as approximate.
Almost every UK and Irish lawn is a ryegrass and fescue mix, whether it was sown or turfed. We assume that, and use 9°C as the seeding threshold.
Thresholds for every species
The differences are small. Ryegrass is the quickest off the mark; bluegrass is the slowest and wants the warmest soil. Everything else sits between.
| Species | Soil needed | Days to sprout |
|---|---|---|
| Perennial ryegrasslikely yours | 8°C | 5–10 |
| Red / chewings fescuelikely yours | 8–10°C | 10–14 |
| Tall fescue | 10–12°C | 10–14 |
| Browntop bentColonial bentgrass | 10–12°C | 14–21 |
| Smooth-stalked meadow grassKentucky bluegrass | 12–13°C | 14–28 |
Feeding
Why timing decides whether a feed does anything at all.
Coming in the app
Grass takes up nitrogen when it is growing. Feed a lawn that has stopped and most of it washes past the roots — which is why timing beats product choice.
Right now this lawn is not growing fast enough to make much use of a feed.
The app will work out the actual feeding windows for your lawn — along with weed control, scarifying and moss treatment — and tell you when they open without you having to check.
TR25, Isles of Scilly in detail
Soil temperature in TR25, Isles of Scilly is currently 15.2°C at 6cm, and falling about 0.7°C over the next 10 days. That depth matters because it is where grass seed sits and where roots start working, and it lags air temperature by days — which is why a warm afternoon here tells you very little on its own.
Lawns in this area are typically perennial ryegrass with fescue, which is what most lawns round here are sown with. That blend needs the soil to hold above 9°C before seed germinates reliably. Seeding conditions are open — soil is 15.2°C at 6cm and holding above 9°C.
6 of the next 10 days look workable. The other 4 are held back by wet grass or soft ground. The best weekend slot right now is Sunday 10am–6pm, on the basis that ground firm — 58mm rain over the last week, soil texture assumed.
The next recommended window in TR25 opens at 5pm on Wednesday 21 October, because the rain clears by then. Underfoot, the ground reads as firm after 9mm rain over the last week, soil texture assumed.
Save this lawn and we will email you when the windows open.
We already send you the forecast email? Use the same address.
Single-model forecast here — no ensemble covers this location, so there are no odds to show. Forecast from Open-Meteo, refreshed through the day. Soil temperature is modelled, not measured — how that works and where the thresholds come from.