Home Life & Style Why mowing your lawn in the morning is 'dangerous' – expert's dire...

Why mowing your lawn in the morning is 'dangerous' – expert's dire warning


Mowing your lawn in the morning may seem like a great way to check a daily task off the list, yet according to experts, doing poses a dangerous risk to both your garden and your personal health. This has little to do with the actual time on the clock, and more to do with the outside conditions prominent at that time.

Overnight, small droplets of water known as dew begin to form on outside objects – including the grass which makes up your garden lawn.

This occurs due to the process of condensation when the temperature of a surface cools down to a point below the air around it.

According to the Met Office: “Dew forms most easily on surfaces that do not conduct heat from the ground – grass and the rooftops of cars are some of the most frequently seen examples. It usually forms during the calm weather associated with high-pressure systems.”

While you may begin to notice dew in the autumn and early winter, dew can form in warm, humid climates too.

Dew often turns to frost in the colder winter months, as the temperature drops below freezing at night.

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Why does dew make it dangerous to cut your grass?

There are several reasons why experts warn people should not cut their grass on dewy mornings.

Mowing wet grass can pose a danger to your health

According to experts from home advice platform Bob Vila, mowing your grass can actually be “dangerous”.

One of the biggest threats comes from the combination of water, from the morning dew, and electricity from your lawnmower.

The experts warn: “Using an electric lawn mower on wet grass—especially with an extension cord—runs the risk of electric shock.”

This is particularly true if any of the wires beneath your lawnmower have become damaged or worn over time.

There is also the risk of slipping over when in the process of mowing your lawn due to the “slickness” of the grass.

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Wet grass can damage your lawnmower

Gardeners are urged not to cut their grass when it is wet, regardless of the time of day, as this can end up causing irreparable damage to your lawnmower.

When excessive moisture makes its way into the machine’s fuel tank, this can cause erosion and contamination of any leftover fuel.

Damp grass cuttings may also stick to parts of the lawnmower or clump up around the blade itself, forcing the machine to work harder.

Mowing wet grass is more difficult

Cutting wet grass is no easy ride, with blades slicker and harder for the blades to cut.

This can result in an uneven lawn which can easily be avoided by taking on the task when the ground is completely dry.

When is the best time to mow my garden lawn?

Gardeners should aim to mow their lawns around once a week between spring and autumn, according to the Royal Horticultural Society.

The specific time of day that is best to mow the lawn varies, experts from Fantastic Gardeners suggesting between 8am and 1am is the optimum time – as long as the ground is dry.

By 10am, any morning dew should have evaporated if it is a dry day.

Late afternoon is also cited as a good time to mow your garden lawn.

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