The 75p Natron trick for removing moss from your lawn

When you first step on the lawn in spring, it can feel spongy underfoot. Instead of fresh blades of grass, there are often dark patches and a thick carpet of moss. Before expensive specialist products end up in the trolley at the DIY store-or the whole lawn gets dug up-more and more hobby gardeners are reaching for something that’s already in the kitchen cupboard and costs only about 75p.

Why moss spreads so quickly in a lawn

Moss isn’t a sign of laziness; it’s a sign that conditions aren’t on the grass’s side. It ruthlessly exploits any weakness in the lawn, and after prolonged rain and gloomy winters the balance often shifts.

• Moisture: Persistent wetness and waterlogging encourage moss while the grass struggles.
• Shade: Under trees, by walls or behind hedges, grass grows poorly-moss thrives.
• Compacted soil: Areas that get a lot of foot traffic become hard and poorly aerated, which suits moss.
• Cut too short: Regularly mowing extremely low weakens the grass plants.
• Acidic soil: A low pH holds the lawn back, while moss copes far better.

In many gardens the pattern is the same: the lawn becomes thinner and patchier, while the moss cushions join up into a dense mat. If you simply leave it alone, the moss may die back at some point-but what you’re left with are bare, unsightly patches. Hardly anyone wants that in front of the living-room window.

The 75p trick: kitchen powder instead of harsh chemicals

Where people once quickly reached for aggressive moss killers-or even vinegar-a trend from the United Kingdom is pointing to a straightforward kitchen staple: bicarbonate of soda, specifically sodium hydrogen carbonate (often sold as baking soda or bicarbonate). You can pick up tubs in discount supermarkets and chemists for pennies.

"A spoonful of kitchen powder in water, sprayed precisely-and the moss dries out within a few days."

Online, amateur gardeners rave about the results: the powder is mixed with water and applied straight onto the mossy areas, without resorting to vinegar or chlorine-based cleaners. For the environment and the soil, that approach is noticeably gentler than many traditional moss killers.

How to apply bicarbonate of soda in detail

If you want to try the method, it’s best not to treat the whole garden immediately. Professionals advise starting with a small test patch and watching how it performs.

Step-by-step guide to the bicarbonate of soda trick

• Mix the solution: Put two to three tablespoons of bicarbonate of soda into a standard pressure sprayer or a watering can with a fine rose, then top up with water. Stir or shake well until the powder has dissolved.
• Choose the right weather: A dry, ideally warm day works best. Rain would wash the solution off straight away.
• Apply with precision: Spray or water only the moss cushions-don’t wet the entire lawn. Avoid ornamental plants, borders and young seedlings.
• Wait for it to work: Within two to three days, the moss turns yellowish to brown and dries out.
• Rake it out: Thoroughly remove the dead, crumbly moss layer with a lawn rake and dispose of it with green waste.

How well it works depends on factors such as the weather, the concentration and how thick the moss layer is. Very stubborn areas may need a second treatment. However, dumping too much powder onto a small patch can also stress the grass. It’s safer to dose cautiously and, if in doubt, start with less.

It only tackles the symptom: how to stop moss coming back

Bicarbonate of soda can kill mossy patches fairly reliably-but it doesn’t remove the underlying causes. If shade, waterlogging and compaction remain, the moss will return quickly. Institutions such as the Royal Horticultural Society put it simply: a strong lawn is the best defence against moss.

"If you want to get rid of moss for good, you need to strengthen the lawn-not just spray and hope."

Key care steps to prevent fresh moss growth

• Scarify regularly: Lightly scarify in spring to remove thatch and dead plant material. This improves airflow through the turf.
• Aerate the soil: In heavily used areas, punch holes with an aerating fork or specialist tools so air and water can penetrate more easily.
• Adjust mowing height: Don’t keep cutting it like a “carpet lawn”. A mowing height of around four centimetres encourages dense growth and shades the soil better.
• Improve drainage: Where water sits for a long time, drainage pipes, adding sand or re-grading small sections can help rainwater run off.
• Check soil pH: A simple pH test from a garden centre shows whether the soil is too acidic. If it’s very acidic, adding lime may be sensible.
• Ensure nutrients: A balanced lawn fertiliser in spring and early summer supports strong grass that can outcompete moss.

It’s the combination-soil aeration, scarifying and correct feeding-that restores a lawn over the long term. Where grass grows thickly, moss has little opportunity to spread.

What’s behind the effect of bicarbonate of soda

In higher concentrations, bicarbonate of soda alters the surface conditions around plants. Moss’s fine structures are particularly sensitive to that change, so it dries out more quickly and loses vitality. Compared with moss, grasses tend to be tougher-provided the dosage isn’t excessive.

At the same time, the rule is simple: anything that damages plant tissue should be used with care. If you spray across large areas, you can harm more delicate lawn varieties too. That’s why caution-and a small test patch-should always come first.

Where the trick makes sense-and where it doesn’t

The bicarbonate of soda approach works especially well for small problem spots in the garden:

• shaded corners under trees
• transition areas alongside hedges or walls
• small lawns in courtyards
• places that are difficult to reach with machinery

On larger lawns, a spray bottle and bicarbonate solution soon reach their limits. In those cases, broad-based care-such as aeration, liming and more appropriate watering-does most of the heavy lifting. The kitchen powder is better viewed as an add-on and a quick fix for specific patches.

Risks, alternatives and sensible combinations

When using household remedies outdoors, it’s easy to fall into the trap of thinking “more is better”. With lawns, that can backfire. Overly strong solutions or repeated applications may damage grass blades and roots. Soil microorganisms can also react badly to sudden, drastic shifts in surface conditions.

As alternatives, mechanical options such as raking out, scarifying, or cutting out very thick moss mats with a spade are commonly recommended. They take more effort, but they interfere less with soil life. In many situations, the best results come from combining mechanical removal with a targeted bicarbonate-of-soda treatment.

If you overseed immediately after removing the moss, you make the most of the newly opened surface. Special overseeding mixes close gaps quickly and help prevent moss from moving back in. In very shady spots, it may be more practical to abandon the idea of a conventional lawn altogether and use shade-tolerant perennials, ground cover plants or bark mulch instead. That creates a stable surface that needs less ongoing work.

In the end, the 75p trick with bicarbonate of soda is a useful tool for hobby gardeners. It doesn’t replace proper lawn care, but it can help where moss is most annoying-without harsh chemicals and without noticeably denting your budget.