You can usually cut your grass whenever it’s actively growing, the ground is firm, and the grass is dry, but there are a few seasonal and daily “sweet spots” that make it much healthier.

Quick Scoop

  • Start regular mowing in early to mid‑spring , once growth picks up and daytime temps are consistently around or above 10 °C.
  • Stop mowing in late autumn , when growth slows and temperatures sit around 6 °C or lower.
  • Best time of day: mid‑morning or late afternoon , when the grass is dry and it’s not too hot.
  • Avoid mowing on frosty, frozen, waterlogged, or scorched lawns; wait until conditions improve.

By Season: When You Can Cut Grass

  • Winter
    • Generally you don’t need to mow; grass barely grows in cold weather.
* If there’s an unusually mild spell and the grass is clearly growing, you can mow lightly, but only if the ground is firm and frost‑free.
  • Early Spring (late Feb–March, depending on climate)
    • First light cut of the year once the lawn starts growing again and days warm up.
* Use a **high setting** , just “topping” the grass to wake it up and thicken the sward.
  • Mid/Late Spring (April–May)
    • This is peak growth; plan to mow every 7–10 days, even weekly in fast growth.
* Don’t remove more than about one‑third of the grass height in a single cut to avoid stress.
  • Summer
    • Once a week is usually enough in normal conditions.
* In drought or heatwaves, raise the cutting height or pause mowing so you don’t scalp dry, stressed grass.
  • Autumn (Sept–Oct, possibly early Nov)
    • Grass often has a second flush of growth, so weekly or fortnightly mowing is still fine.
* You can keep going until growth really slows or night temps drop close to freezing.
  • Late Autumn/Early Winter (late Oct–Nov)
    • Gradually reduce mowing frequency and stop once growth has basically halted and daytime temps hover around 6 °C or below.

Best Time of Day

  • Good times
    • Mid‑morning: dew has dried, but it’s not too hot.
* Late afternoon/early evening: heat eases, and grass has time to recover before night.
  • Times to avoid
    • Very early morning: grass is wet with dew, so blades tear instead of cutting cleanly and disease risk increases.
* Midday in strong sun: heat plus a fresh cut can stress the lawn.

* Late at night: freshly cut grass stays damp and more vulnerable to fungus.

Practical Rules of Thumb

  1. Check growth, not just the date
    • If you can see the grass putting on height, you can generally cut, as long as the soil isn’t soggy or frozen.
  1. Mind the weather and soil
    • Don’t mow on waterlogged, frosty, or frozen ground; you’ll compact soil and damage roots.
  1. Height and frequency
    • Cut often enough that you never remove more than about one‑third of the blade length.
  1. Grass type matters
    • Cool‑season grasses (common in cooler, temperate regions) grow strongly in spring and autumn; warm‑season grasses peak in summer, and mowing patterns adjust accordingly.

Simple Example

If it’s mid‑March, the soil is firm, daytime highs are around 10–12 °C, and your lawn looks a bit shaggy, you can give it a first light cut on a high mower setting in mid‑morning once the grass is dry.

Information gathered from public forums or data available on the internet and portrayed here.