Whilst not a particularly fast-acting weed killer, compared to those which show results in a couple of days, results on weeds should start to be visible after a couple of weeks. Although it’s one of the strongest weed killers, it may take a few weeks to notice brambles dying off. A repeat application after six weeks might be required. One thing to note about this weed killer is that it doesn’t work especially fast. To kill the roots, it needs around 3-4 weeks. While the weeds do start to wilt within a few hours, it takes 7 days before I actually felt the weed killer was working! Despite the slower results, it does work as well as others on the market, and it’s very easy to use.

Bayer US | Bayer United States Products | Bayer US | Bayer United States

The Weedol Ultra Tough WeedKiller Liquid Concentrate is arguably the easiest weed killer to apply of all the ones I tested. It doesn’t come pre-mixed, but it can be diluted in either a watering can or sprayer.

What Is The UK’s Best Weed Killer?

A non-toxic weed killer may contain active ingredients such as pelargonic acid and maleic acid hydrazide.

Liberator - Bayer Crop Science UK

Safety and Environmental Impact: It was important to assess the overall environmental impact of each weed killer as well as the risk to the user’s safety. As a result, any product where the nozzle leaked was rated lower, as this risked harm to the gardener using it. Products with excessively harmful chemicals, such as Glyphosate, were marked down, as these pose a risk to wildlife. Non-Hodgkin lymphoma patients started suing Monsanto by the hundreds after a 2015 World Health Organization report suggested glyphosate, the key ingredient in Roundup, might cause cancer. This bottle contains 360 g of product, enough to cover a 1666 sqm area. It does require mixing before application, but it comes with a measuring cap included which is very easy to use. It can be applied using either a watering can or a sprayer.

When used as a pre-emergence herbicide, Liberator reduces the number of weeds that a post-emergence herbicide – such as Atlantis OD or Monolith – has to control. This improves overall weed control while reducing the potential to select for resistant weeds. One downside of this weed killer is that it makes the soil unusable for a period of time. This is fairly disappointing if you’re wanting to get planting. The instructions state that it takes a ‘growing season’ to wear off, meaning potentially an entire spring or summer! This weed control is exceptionally strong, with a single 2 L bottle treating up to 3332 sqm. It would be ideal for those with a badly overgrown allotment or garden, but it’s also a good choice if you’re after a super strong weed killer for deep-rooted weeds.