When to first mow your lawn: exact spring timing

Why first mowing timing is critical

Mowing too early (March) damages newly-growing grass still soft and frost-vulnerable. Mowing too late (May) and your lawn becomes a wilderness of seed-heads spreading seed across your garden. The timing of the first spring mowing determines whether your grass grows healthy, thick and green or thin, frost-damaged and overgrown.

The first mowing is not just cleanup - it sets the tone for the entire growing season. Correct timing and height in April give your grass the chance to recover fully from winter and thicken up densely.

Exactly when to mow first?

First mowing: when grass reaches 5-7 cm (usually early-mid April). This is not March, however green you see. Grass growing in March is still frost-vulnerable and mowing breaks off frost-damaged tissue.

Control test: Take your lawn between thumb and finger. Can you pull it up 5-7 cm? Then it is time. Still only 2-3 cm? Wait another week.

For southern/warmer regions: sometimes late March. For northern cold areas: sometimes not until late April. Monitor local growth rates.

Golden rule: First mowing always after Easter (mid-April), unless your region is very warm.

Step 1: Pre-mowing inspection (late March)

Before you mow, inspect your lawn for winter damage and obstacles.

Check for:

• Dead patches (winter blight, fungal diseases)
• Mole hills (small mounds - avoid)
• Twigs, stones, metal debris
• Water puddles (drainage issues)

Remove before mowing: All twigs, stones, metal pieces. These damage mower blades and create ragged cuts.

For puddles: Do not mow. Wait 2-3 days after rain for soil to dry. Wet grass types are damaged under heavy mower.

Step 2: First mowing (early-mid April)

When your grass reaches 5-7 cm, time for first mowing.

Cutting height: 4-5 cm. This is higher than summer mowing height (3-4 cm). Higher first mowing strengthens grass and gives root system more leaf surface to store energy.

Mower type: No rotary mulcher (too aggressive for young growth). Cylinder or wheeled mower is ideal.

Speed: Mow slowly. No rushing. Grass wanting to grow cannot cope with high speed.

Collect clippings: First mowing releases much dead material (thatch). Bag this instead of leaving in garden. Prevents fungal growth.

Step 3: Second mowing (two weeks later, late April)

After first mowing your grass grows fast. Two weeks later second mowing is needed.

Timing: Wait until grass reaches 5-6 cm again.

Cutting height: Now 4 cm (slightly lower than first mowing).

Benefit: Second mowing strengthens density. Regular cutting stimulates shoots (tillering). Grass thickens.

Keep clippings: If grass is healthy, leave clippings (mulch). Returns nutrients. Up to three times.

Step 4: Third mowing (two weeks later, mid-May)

Through May grass grows explosively. Third mowing in May establishes normal summer schedule.

Timing: When grass reaches 6-7 cm.

Cutting height: Now 3-4 cm (summer normal).

Frequency: From now weekly or bi-weekly mowing, depending on growth.

Clippings: Mulch them in (good nutrients back to soil).

Preparation before first mow: importance

Before your first mowing, lawn prep cannot be skipped.

Feeding schedule:

• Early March: light feed (nitrogen-low, potassium-rich) if snow gone
• Late March: normal spring feeding (balanced)
• Mid-April: before second mowing no extra feed (no overdoing)

Drainage:

• Wet lawn in April? Check drainage
• Spiking (aeration) helps against winter soil compaction

Avoid mistakes

Mistake 1: Mowing too early (February-March)

• Damages frost-vulnerable young grass
• Releases dead leaf material without growth capacity
• Result: thin, weak lawn

Mistake 2: First mowing at summer height (2-3 cm)

• Too aggressive for young grass
• Damages much healthy leaf
• Stresses the system

Mistake 3: Mowing too hard/fast

• Crushes young shoots instead of cutting cleanly
• Can tear instead of making clean cuts

Mistake 4: Mowing wet soil

• Flattens grass
• Mower compacts soil
• Creates muddy footprints

Differences by grass type

English ryegrass, clover (typical benelux):

• Start April, full speed
• First height: 4-5 cm
• Loves regular cutting

Bent grasses (fine, ornamental lawns):

• Wait until mid-April
• Cut higher (5-6 cm first time)
• More careful cutting

Thick/coarse grass mix:

• Can start early April
• Cut at 4-5 cm
• Faster recovery after mowing

Step-by-step

Step 1: Monitor growth rates March-April

From late March onward: check lawn weekly. Measure growth height (pull, measure).

Step 2: Pre-mowing cleanup

When grass reaches 3-4 cm: remove all twigs, stones and metal. Check for winter damage.

Step 3: First mowing

When grass reaches 5-7 cm: first mowing at 4-5 cm height. Slowly, collect clippings.

Step 4: Second mowing

Two weeks later: second mowing at 4 cm when grass reaches 5-6 cm again.

Step 5: Third mowing and beyond

Mid-May: third mowing at 3-4 cm. Then weekly or bi-weekly schedule.

Frequently asked questions

Can I mow in March if it is warmer than normal?

Carefully. Even if March is warm, grass is still frost-vulnerable. Wait until mid-April. Early mowing in warm March costs more than you gain.

What if my lawn does not grow despite May?

Check:

• Drainage (wet feet?)
• Feeding (pale grass = nitrogen shortage)
• Diseases (fungal, insects)
• Seeding (weed spores)

Underfed lawns grow slowly. Give extra feed and wait.

How much can I cut at once?

Rule of 1/3: never cut more than 1/3 of grass length. More than this stresses the system. So if grass is 7 cm, cut to 4-5 cm (3 cm removed).

Should I bag clippings first three mowings?

First mowing: yes (much thatch). Second and third: can stay if grass is healthy. Nutrients go back to soil.

What if frost damage is visible after first mowing?

Small patches of dead grass: wait, it recovers in 2-3 weeks. Large areas dead? Possibly winter diseases. Feed and reseed damaged patches.

Discover your own garden design

At [gardenworld.app](https://gardenworld.app) you can upload your front yard and see how your lawn care optimally fits your garden plan - with seasonal advice and realistic grass-type growth for spring mowing.