SL2, Buckinghamshire

SL2, Buckinghamshire51.5357, -0.6058from your postcode

Mowing

When you can next cut it, and the best slot this weekend.

Best weekend slot

Sunday 4pm–5pm

Verdict: Good to go, 70% chance it holds

grass damp — wet underfoot, rain falling then

Next mow

Today 2pm–7pm

Verdict: Prime time, 90% chance it holds

rain earlier that day, ground firm

  • Worth watching: Ground still soft. 30mm rain over the last week, medium (loam) soil. A mower will mark it, and a ride-on will rut it. More

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.

  1. Monday 19 October: 5 hours worth using. 2pm–7pm — rain earlier that day, ground firm
    Monday 19 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance—————<5%<5%25%45%>95%>95%>95%95%95%——
    VerdictAlready goneAlready goneAlready goneAlready goneAlready goneForget itForget itPushing itTouch and goPrime timePrime timePrime timePrime timePrime timedarkdark
    Rainchance·····0%0%0%0%1%0%0%7%7%0%3%
    Rainmm·····———————————
    Grass·····soakedsoakedsoakedwetdrydrydrydrydrydrydry
    Ground·····firmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirm
    Temp·····10°11°12°12°13°13°12°12°11°11°11°
    Windkm/h·····101313131513129576
    Daylight·····✓✓✓✓✓✓✓✓✓——

    Growth: barely growing (growth potential 0.16). 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.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Monday 19 October · 2pm–7pmReasonably confident

    2pm–7pm — rain earlier that day, ground firm

    90% prime time — the chance it holds right through, not the chance at any one hour. About 1 run in 10 hit rain.

    Limiting factor:none

  2. Tuesday 20 October: no hours worth using. No — 0.1mm of rain falling.
    Tuesday 20 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———<5%<5%<5%<5%<5%<5%<5%<5%<5%<5%———
    VerdictdarkdarkdarkForget itForget itForget itForget itForget itForget itForget itForget itForget itForget itdarkdarkdark
    Rainchance66%63%64%60%63%69%67%61%54%47%37%38%34%16%19%8%
    Rainmm0.40.40.50.50.70.80.70.60.50.40.40.30.20.10.1—
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoaked
    Groundfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirmfirm
    Temp12°12°12°12°12°12°12°12°12°12°13°13°13°12°11°11°
    Windkm/h121213111110129667913141414
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.19). 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.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Tuesday 20 OctoberConfident

    No — 0.1mm of rain falling.

    <5% forget it. Almost every run found the grass too wet.

    Limiting factor:grass wetness

  3. Wednesday 21 October: no hours worth using. No — 0.3mm of rain falling.
    Wednesday 21 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———<5%<5%<5%<5%<5%<5%<5%<5%<5%<5%———
    VerdictdarkdarkdarkForget itForget itForget itForget itForget itForget itForget itForget itForget itForget itdarkdarkdark
    Rainchance22%20%34%46%45%29%29%29%22%31%31%33%33%26%25%14%
    Rainmm0.10.10.20.50.30.20.20.10.20.30.30.20.20.20.20.1
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoaked
    Groundfirmfirmfirmsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoft
    Temp9°9°9°10°10°10°11°12°13°13°13°12°11°9°8°8°
    Windkm/h8101014171717161516182025313532
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.11). 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.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Wednesday 21 OctoberConfident

    No — 0.3mm of rain falling.

    <5% forget it. Almost every run found the grass too wet.

    Limiting factor:grass wetness

  4. Thursday 22 October: nothing to cut. Nothing to cut — the grass is barely growing (growth potential 0.08).
    Thursday 22 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———<5%<5%<5%5%10%15%20%55%60%55%———
    Verdictnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growing
    Rainchance24%16%12%3%4%5%4%5%4%19%14%23%30%28%28%55%
    Rainmm0.10.20.1——————0.1—0.10.20.30.20.5
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakeddampdampdampdampwetsoaked
    Groundsoftsoftsoftsoftsoftsoftsoftsoftfirmfirmfirmfirmfirmfirmfirmfirm
    Temp6°6°6°6°7°8°9°9°10°11°12°12°12°11°10°10°
    Windkm/h212469910101010111091012
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.08). Not enough to be worth cutting, which is why no hour is recommended today whatever the weather does.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Thursday 22 OctoberReasonably confident

    Nothing to cut — the grass is barely growing (growth potential 0.08).

    60% nothing to cut. About 1 run in 3 found the grass barely growing.

    Nothing to cut. The odds below describe the weather only — growth decides whether a cut is wanted, and it is judged separately.

    Limiting factor:growth

  5. Friday 23 October: nothing to cut. Nothing to cut — the grass is barely growing (growth potential 0.10).
    Friday 23 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———<5%<5%<5%<5%<5%<5%5%10%15%20%———
    Verdictnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growing
    Rainchance59%54%57%42%45%36%43%37%27%21%24%32%29%26%17%12%
    Rainmm0.60.50.70.40.40.20.20.30.10.40.10.20.30.30.20.1
    Grasssoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedsoakedwetwetwetwet
    Groundbogbogsoftsoftsoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggysoggy
    Temp12°11°10°9°9°9°9°9°9°9°9°9°8°8°8°8°
    Windkm/h22242626252630364041403937353332
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.10). Not enough to be worth cutting, which is why no hour is recommended today whatever the weather does.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Friday 23 OctoberReasonably confident

    Nothing to cut — the grass is barely growing (growth potential 0.10).

    20% nothing to cut. About 2 runs in 3 found the grass barely growing.

    Nothing to cut. The odds below describe the weather only — growth decides whether a cut is wanted, and it is judged separately.

    Limiting factor:growth

  6. Saturday 24 October: nothing to cut. Nothing to cut — the grass is barely growing (growth potential 0.08). Conditions themselves are fine.
    Saturday 24 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance———60%55%55%55%65%75%70%65%65%55%———
    Verdictnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growing
    Rainchance2%4%9%2%9%6%9%8%8%16%18%22%22%24%14%24%
    Rainmm——0.1———0.20.20.10.30.40.60.40.60.40.5
    Grassdampdampdampdampdampdampdampdampdampdampdampdampdampwetwetwet
    Groundsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoft
    Temp6°6°6°6°7°7°9°10°11°11°11°11°10°9°9°9°
    Windkm/h20191817151515161617171717151517
    Daylight———✓✓✓✓✓✓✓✓✓✓———

    Growth: barely growing (growth potential 0.08). Not enough to be worth cutting, which is why no hour is recommended today whatever the weather does.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Saturday 24 OctoberLow confidence this far out

    Nothing to cut — the grass is barely growing (growth potential 0.08). Conditions themselves are fine.

    75% nothing to cut. About 1 run in 4 found the grass barely growing.

    Nothing to cut. The odds below describe the weather only — growth decides whether a cut is wanted, and it is judged separately.

    Limiting factor:growth

  7. Sunday 25 October: 1 hour worth using. 4pm–5pm — grass damp — wet underfoot, rain falling then
    Sunday 25 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance——10%10%10%25%45%45%55%65%65%70%————
    VerdictdarkdarkForget itForget itForget itPushing itTouch and goTouch and goTouch and goTouch and goTouch and goGood to godarkdarkdarkdark
    Rainchance16%14%18%12%6%14%14%8%14%6%20%10%16%14%10%10%
    Rainmm0.20.10.20.2—0.10.20.20.1—0.20.10.10.20.10.1
    Grasssoakedsoakedsoakedsoakedsoakedsoakedwetdampdampdampdampdampdampdampdampdamp
    Groundsoggysoggysoggysoggysoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoft
    Temp14°15°15°16°17°17°18°18°17°16°15°14°13°12°12°11°
    Windkm/h18192124273032333333323130292828
    Daylight——✓✓✓✓✓✓✓✓✓✓————

    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.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Sunday 25 October · 4pm–5pmLow confidence this far out

    4pm–5pm — grass damp — wet underfoot, rain falling then

    70% good to go. About 1 run in 3 found the grass too wet.

    Limiting factor:grass wetness

  8. Monday 26 October: nothing to cut. Nothing to cut — the grass is barely growing (growth potential 0.07).
    Monday 26 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance——40%35%30%30%35%35%30%25%30%30%————
    Verdictnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growingnothing to cut — the grass is barely growing
    Rainchance14%16%18%12%10%10%14%16%20%10%14%18%18%8%12%20%
    Rainmm0.20.20.40.20.10.10.30.30.20.10.30.30.30.10.10.2
    Grasswetwetwetwetwetwetwetwetwetwetwetwetwetwetwetwet
    Groundsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoft
    Temp6°6°7°8°9°10°10°11°11°11°11°10°10°10°10°10°
    Windkm/h4569121416171614121212121110
    Daylight——✓✓✓✓✓✓✓✓✓✓————

    Growth: barely growing (growth potential 0.07). Not enough to be worth cutting, which is why no hour is recommended today whatever the weather does.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Monday 26 OctoberLow confidence this far out

    Nothing to cut — the grass is barely growing (growth potential 0.07).

    40% nothing to cut. About 2 runs in 3 found the grass barely growing.

    Nothing to cut. The odds below describe the weather only — growth decides whether a cut is wanted, and it is judged separately.

    Limiting factor:growth

  9. Tuesday 27 October: no hours worth using. No — 0.5mm of rain falling.
    Tuesday 27 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance——20%15%25%30%50%45%60%65%60%60%————
    VerdictdarkdarkPushing itForget itPushing itPushing itTouch and goTouch and goTouch and goTouch and goTouch and goTouch and godarkdarkdarkdark
    Rainchance20%12%22%20%16%14%14%29%8%16%14%16%10%12%4%4%
    Rainmm0.20.20.30.20.20.20.30.3—0.10.30.20.10.1—0.1
    Grasssoakedsoakedsoakedsoakedsoakedwetdampdampdampdampdampdampdampdampdampdamp
    Groundsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoft
    Temp14°15°15°15°16°16°16°16°15°15°14°13°13°12°12°11°
    Windkm/h23252628303233343330262319171614
    Daylight——✓✓✓✓✓✓✓✓✓✓————

    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.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Tuesday 27 OctoberLow confidence this far out

    No — 0.5mm of rain falling.

    65% touch and go. About 1 run in 3 found the grass too wet.

    Limiting factor:grass wetness

  10. Wednesday 28 October: 2 hours worth using. 2pm–3pm — grass wet — rain falling then
    Wednesday 28 October, hour by hour
    5am6am7am8am9am10am11ammidday1pm2pm3pm4pm5pm6pm7pm8pm
    Chance——50%50%50%55%55%60%60%65%65%65%————
    VerdictdarkdarkTouch and goTouch and goTouch and goTouch and goTouch and goTouch and goTouch and goGood to goTouch and goGood to godarkdarkdarkdark
    Rainchance12%2%4%0%4%2%2%4%6%0%12%6%4%8%8%4%
    Rainmm0.1—————————0.1———0.1—
    Grasswetwetwetwetwetdampdampdampdampdampdampdampdampdampdampdamp
    Groundsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoftsoft
    Temp10°10°10°11°11°12°13°13°13°13°13°13°13°13°13°13°
    Windkm/h12131314161718192021212223232323
    Daylight——✓✓✓✓✓✓✓✓✓✓————

    Growth: barely growing (growth potential 0.19). 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.Chance is the share of 94 forecast runs — the same weather models re-run from slightly different starting conditions — in which you could have mowed that hour. The rows below it are what those runs expect on average, which is why an hour can look reasonable line by line and still fall short: the chance only counts runs where everything came together at once. Hover any cell for what the runs that ruled it out actually hit.

    Wednesday 28 October · best slot2pm–3pmLow confidence this far out

    2pm–3pm — grass wet — rain falling then

    65% good to go. About 1 run in 3 found the grass too wet.

    Also mowable today: 4pm–5pm (65%)

    Limiting factor:grass wetness

good to go touch and go dark, frost or snow already goneFainter means fewer forecast runs agree.

How you feel about mowing

Sensible middle ground.

Petrol or battery. The baseline.

Growth

How fast it is growing, and when it will need cutting again.

16%Barely growing

Of the fastest this grass could grow. The turf-industry measure, from today's temperature and day length.

The lawn is barely growing, so it does not need cutting. Leave it — taking leaf off a sward that cannot replace it costs more than it gives.

Held back by both temperature and short days — 10.5 hours of daylight at 11°C.

Over the next 10 days
about 6mm 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 SL2, Buckinghamshire

9.5°C49°F

at 6cm — germination depth

Seeding conditions are open — soil is 9.5°C at 6cm and holding above 9°C.

Warming over the next 10 days.

Cross-checks against an independent estimate from air temperature (10.9°C), which agrees to within 0.3°C.

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.

Soil temperature at 6cm for reliable germination. Sources onthe method page.
SpeciesSoil neededDays to sprout
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

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.

Why timing beats product choice

SL2, Buckinghamshire in detail

Soil temperature in SL2, Buckinghamshire is currently 9.5°C at 6cm, and rising about 0.9°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 9.5°C at 6cm and holding above 9°C.

1 of the next 10 days look workable. The other 9 are held back by wet grass or soft ground. The best weekend slot right now is Sunday 4pm–5pm, on the basis that grass damp — wet underfoot, rain falling then.

The next recommended window in SL2 opens at 2pm on Monday 19 October, and holds while conditions stay put. Underfoot, the ground reads as firm after 4mm rain over the last week, medium (loam) soil.

One email when the app is ready, and nothing else. Unsubscribe in one click. See the privacy notice.

Save this lawn and we will email you when the windows open.

We use your address for your account and nothing else. See the privacy notice.

We already send you the forecast email? Use the same address.

Chances counted across 94 forecast runs from MOGREPS-UK, 2km and ICON-EU-EPS, 7km and ECMWF IFS ensemble, 25km. Forecast from Open-Meteo, refreshed through the day. Soil temperature is modelled, not measured — how that works and where the thresholds come from.