Mowing wet grass: why your mower keeps waiting for it to dry

Melbourne does this thing every spring where it rains just enough, just often enough, that the lawn never quite dries out - and grows like it's being paid to. Can you mow wet grass? Physically, sure. Whether you should is another question, and once you know what wet mowing does to a lawn, "the mower rescheduled again" stops being annoying.

What goes wrong

• Wet grass doesn't cut, it tears. Blades slide off wet leaves instead of slicing them. Torn tips bruise brown within a day or two, so the lawn looks worse on Tuesday than it did before Saturday's mow.
• Clumping. Wet clippings pack into sodden mats that smother the grass underneath and turn to slime. They also cake inside the mower deck, which is why the finish gets rougher the longer a wet mow goes on.
• Ruts and scalping. Soaked ground is soft ground. Mower wheels sink, leave tracks, and where a wheel drops the blade digs in and scalps a stripe down to dirt. On a soft new lawn one wet mow can leave marks that last months.
• Spreading disease. Fungal spores travel in water. A mower rolling through a wet lawn with brown patch or dollar spot carries it across the whole yard - and to the next yard, if the deck isn't cleaned.
• It's slower and it's slippery. A wet slope and a mower is how ankles get broken, and electric mowers plus standing water is its own bad idea.

When it's fine

Morning dew or a light shower an hour ago? Go ahead - if you can walk the lawn without your shoes getting properly wet, it'll mow fine. Sharp blades, a slightly higher cut and a slower pace cover the rest. The real "no" is soaked soil: if your feet leave impressions, the ground will take wheel ruts, and that damage outlasts any scheduling annoyance.

The endless-wet-spring problem

Some years there's no dry window and the choice becomes wet mow or jungle. A decent mower handles it: cut high (never more than a third of the blade), half-width passes so the deck doesn't choke, catcher on because mulched wet clippings just clump, and a deck clean afterwards. It won't be the best finish of the year, and that's fine - the alternative is worse.

If part of your lawn is always wet, stop blaming the forecast and look at where the water's coming from: compacted soil, a downpipe emptying onto the lawn, or a low corner that collects the whole yard's runoff. Aeration helps mildly; fixing where the water goes helps permanently.

What this means when you've booked a mow

A mower who pushes your job a day or two after heavy rain is doing your lawn a favour. On Mowie you'll see the new time in the app and can chat directly if the timing matters - and since you only pay after you approve the photo of the finished job, a rushed mow in bad conditions helps nobody. The mowers who wait for the right window are the ones whose after-photos look good enough to approve on sight.