What is the most important month for lawn care in the UK?

September. The soil is still warm and the rain returns, which makes it the best time to scarify, aerate, overseed and feed.

When should I feed my lawn in the UK?

A spring feed in April, an optional summer feed in wet years, and an autumn feed in September or early October.

Which weed killers can I use on my lawn?

Only products approved for amateur use, with a MAPP number on the label, and only as the label says. Spot treatment or hand weeding is often enough.

When is the last cut of the year?

When the grass stops growing, often in November and sometimes later in mild southern winters. Keep the blades a notch higher.

Lawn Care Calendar UK: What to Do Each Month

Lawn care follows the grass, not the calendar. British lawns of ryegrass, fescues and bents grow most in spring and autumn and slow down in hot, dry spells. This calendar suits most of England and Wales; Scotland and the north run a couple of weeks later, the south west a little earlier.

What should you do each month?

Month	Main jobs
January	Keep off frozen or waterlogged grass. Service the mower.
February	Sharpen blades. Rake off debris on dry days.
March	First cut on a high setting once growth starts. Rake and tidy.
April	Spring feed. Treat moss with an approved moss killer. Light scarify.
May	Cut weekly. Patch bare spots. Hand weed or spot treat.
June	Raise the blades in hot spells. Water deeply or let it go brown.
July	Summer care: cut high, no feed in drought.
August	Plan autumn renovation. Keep cutting high.
September	Scarify, aerate, overseed, autumn feed. Test soil pH.
October	Clear leaves, top dress, final feed, fewer cuts.
November	Last cut when growth stops. Keep leaves off the lawn.
December	Rest. Keep off frosty grass.

What does the app’s calendar show?

What a Green Lawn builds a week-by-week task list from the lawn’s location, grass type and mowing height. For a lawn in Manchester, the week of 7 September looks like this:

Calendar tasks in the What a Green Lawn app for a lawn in Manchester — Manchester, 17 September 2026: the week of 7 September with weed control, scarify and overseed (fall).

Across the year the calendar puts feeding in April, May and September to November, weed control at the start of each month from March to October, scarifying in April and September, overseeding in May and September, a spring clean-up in March, leaf clearing in October and a soil pH check in September. December to February are rest months. Each month also has a mowing card with frequency, height and the best time of day.

Which weed and moss killers can you use?

Only products approved for amateur use, with a MAPP number on the label, applied as the label says. Iron sulphate sold as a lawn tonic is not an approved moss killer, see moss in your lawn. A thick, well-fed lawn cut at the right height keeps most weeds out on its own.

How do you adjust the calendar to your lawn?

Watch the grass and the soil, not the date. A cold spring pushes April jobs into May; a mild autumn stretches cutting into December. Soil temperature is the best guide for sowing, see soil temperature for grass. See also first and last cut of the year and when to feed your lawn.

What can you skip?

Feeding in drought, scarifying in summer, and lime without a soil test; many UK lawns do not need it, see should you lime your lawn.

What a Green Lawn turns this calendar into weekly tasks for your own lawn, with the forecast and soil estimate on the same screen.