The best time to cut grass in Spring is when it reaches a height of around 2.5 to 3 inches (6-7.5 cm). 

1. When to Start Mowing in Spring

Wait until:

• Grass is actively growing
• Soil is dry enough to walk on
• Lawn reaches about 5–8 cm (2–3 inches)

Cutting too early can stress the grass and damage soft, wet soil.

in the UK, this is usually March to early April, depending on weather.

2. Best Time of Day to Cut Grass

Timing during the day matters more than most people think.

Ideal time:

Mid-morning (8am–10am)

• Dew has dried
• Grass is dry and upright
• Temperature isn’t too hot

Second best:

Late afternoon (4pm–6pm)

• Lawn has recovered from heat
• Allows time to heal before night

Avoid:

• Early morning (wet grass = uneven cut)
• Midday heat (stresses grass)
• Evening (increases disease risk overnight)

3. Follow the “One-Third Rule”

Never cut more than one-third of the grass height in one go.

Example:

• If grass is 9 cm → cut down to 6 cm

This keeps roots strong and prevents shock.

4. How Often Should You Mow?

• Spring: Once every 1–2 weeks
• Summer: Once a week (or more if growing fast)
• Autumn: Every 2–3 weeks
• Winter: Rarely or not at all

5. Weather Conditions Matter

Only mow when:

• Grass is dry
• Soil isn’t waterlogged
• No frost is present

Avoid mowing:

• Right after rain
• During drought or heatwaves

6. Adjust Cutting Height by Season

• Spring: Medium height (encourages growth)
• Summer: Leave slightly longer to retain moisture
• Autumn: Gradually lower height before winter

7. Pro Tips for a Healthier Lawn

• Keep mower blades sharp for clean cuts
• Alternate mowing direction each time
• Leave clippings occasionally (natural nutrients)
• Edge your lawn for a tidy finish