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The £1.94 hack that works ‘like magic’ to remove moss and black spots on your patio in 10 minutes – it kills weeds too

Published on May 06, 2025 at 08:57 AM

IS your patio covered in stubborn moss and black spots that just won’t shift?

Or have you splashed loads of cash on but with no success?

Moss growing between gray stone blocks.
Gardening gurus have shared a ‘magic’ hack that works to remove black spots and kill moss in just 10 minutes
Uncultivated garden with weeds, dry soil and aged wooden fence
Not only this, but it’ll also banish weeds too
Five-liter container of 14-15% sodium hypochlorite.
Sodium hypochlorite is a potent chemical that annihilates the organisms causing black spots and moss

Well, if you want to get your looking in tip-top shape ready for , then fear not, you’ve come to the right place and will need to listen up to this that works ‘like magic’.

Many of us are sure to have spotted , and black spots on our at least once before.

But thankfully, there’s now a simple trick to banish the nasty stuff – and there’s barely any effort involved.

Luckily for you, numerous have raved about a trick to get your sparkling – and it’ll cost you less than £2 each time.

Posting on the Gardening Tips, a group with 111,400 members, gardening gurus shared their tried-and-tested methods for tackling and black spots.

A popular solution among the group was sodium hypochlorite, a potent chemical that annihilates the organisms causing the black spots and moss.

One user shared her success with the group and beamed: “Sodium hypochlorite cleared mine. I sprayed it all over my patio, left it for half an hour, and then just rinsed it off. Leave longer if you prefer.”;

Another also recommended the substance and added: “Sodium hypochlorite from . Just brush on and rinse off after an hour. It will kill any , too.”;

Meanwhile, third echoed the sentiment and clarified: “Sodium hypochlorite is undiluted bleach, which is really good at any paving.

“This year I have used this and the stains and have all gone now. It even helped to kill off my driveway weeds.”;

At the same time, one shared her rapid results and revealed: “Sprayed my slabs and within 10 minutes the moss and black spots had gone. It really works like magic.”;

But that’s not all, as another thrilled user commented: “I’ve found this to be the only thing that works to get the black spots off. The moss died instantly.”;

Sodium hypochlorite, which is found in bleach, can be diluted with water to treat lichen stains and moss on patios and tarmac.

It should be used sparingly to avoid discolouration or damage to the tarmac and users must always rinse the area thoroughly after application.

Gardeners should make sure to check the before using sodium hypochlorite, as any rain that falls will dilute the product and may compromise its performance.

As a result, it is best used on a dry day where there is no rain forecast.

Sprayed my slabs and within 10 minutes the moss and black spots had gone. It really works like magic

Facebook user

If you fancy giving this hack a try, you can nab a five litre bottle of sodium hypochlorite from for only £9.70.

Sodium hypochlorite is not only great as a patio cleaner and bleaching agent, but it also kills and banishes nasty odours too.

That’s not all, as it can even be used in swimming pools or for water purification purposes too.

To use the high-strength product, which according to the Amazon listing, is “widely regarded as the best patio cleaner chemical on the market”;, simply dilute up to six parts water with one part sodium liquid chlorine.

If you use one litre per use, this hack will cost you just £1.94 each time, making it not only effective but too.

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