Looking for an easy, low-cost way to tackle weeds growing between paving slabs, on your driveway, or around your patio? This homemade weed killer uses just three household ingredients and can help dry out and kill unwanted weeds without reaching for commercial weed control products.
What You'll Need
To make your own patio weed killer, you'll need:
- 1 litre of white vinegar
- 2 tablespoons of salt
- A small squirt of washing-up liquid
- An empty spray bottle
Simply add the ingredients to your spray bottle and gently mix. Avoid shaking too vigorously, otherwise you'll end up with a bottle full of vinegar foam!
How Does It Work?
This homemade weed killer works by dehydrating the plant:
- Vinegar helps break down the weed's outer surface.
- Salt draws moisture out of the plant.
- Washing-up liquid helps the solution stick to the leaves for longer.
When applied during warm, dry weather, the sun helps accelerate the drying process, causing weeds to wither and die back.
How to Apply
For the best results:
- Choose a warm, dry day with no rain forecast for at least 24 hours.
- Spray directly onto the leaves of the weeds.
- Ensure the foliage is thoroughly coated.
- Leave for several days.
- Once the weeds have dried out, brush, scrape or pull away the dead growth.
You may need a second application for larger or established weeds.
Where Should You Use It?
This method works best on:
- Patios
- Driveways
- Block paving
- Gravel paths
- Around kerbs and edging stones
- Cracks in concrete
It is particularly effective on annual weeds and young growth.
Where Shouldn't You Use It?
Avoid spraying this mixture:
- On lawns
- In flower beds
- Around shrubs, trees or plants you want to keep
- On soil intended for future planting
The salt can remain in the soil and may affect future plant growth by reducing soil fertility and altering soil structure.
Is Salt Safe for Driveways and Patios?
Occasional use is generally fine on paving and concrete surfaces. However, repeated applications of salt can potentially affect surrounding soil and vegetation.
If you're treating larger areas such as gravel driveways or access roads, you may find that a dedicated weed management programme is more suitable.
Can Rock Salt Help Prevent Weeds?
Many customers use salt to help suppress weed growth in cracks and gaps. If you're tackling larger areas, our White Rock Salt can be a cost-effective option for certain hard-surfaced areas where plant growth isn't wanted.
It's important to remember that salt doesn't distinguish between weeds and desirable plants, so always apply carefully and avoid areas where you intend to grow flowers, vegetables or grass.
Alternative Ways to Control Patio Weeds
For longer-term weed control, consider:
- Regular brushing and sweeping
- Pressure washing paving joints
- Re-sanding block paving
- Installing weed membrane beneath gravel
- Topping up decorative aggregates to reduce light reaching weed seeds
- Using mulch or bark in borders to suppress weed growth naturally
Frequently Asked Questions
Does vinegar kill weeds permanently?
No. Vinegar kills the visible growth above ground but may not destroy the root system of perennial weeds. Multiple treatments may be required.
Will this kill moss?
It can help dry out moss, but dedicated moss treatments are generally more effective.
Can I use this on my lawn?
No. The mixture will damage or kill grass as well as weeds.
How long does it take to work?
Most weeds begin showing signs of damage within 24 to 48 hours, with full die-back usually occurring within a week during warm weather.
Is homemade weed killer environmentally friendly?
While it avoids synthetic herbicides, salt and vinegar can still affect soil health and surrounding plants. Always use responsibly and only where necessary.
Keep Patios, Paths and Driveways Looking Their Best
Keeping weeds under control is one of the easiest ways to instantly improve the appearance of your outdoor space. Whether you're maintaining a gravel driveway, block-paved patio or garden pathway, regular maintenance and prompt weed removal will help keep surfaces looking neat all year round.
Looking for materials to refresh your outdoor spaces? Explore our range of decorative aggregates, gravel, bark mulch, topsoil and landscaping supplies available for nationwide delivery.
