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Best products to control weeds in paving and paths
The Which? Gardening experts reveal the alternatives to path weedkillers, including glyphosate
Ceri studied horticulture at the University of Reading and RHS Wisley. She edits Which? Gardening magazine and our online gardening content.
Weeds and moss are adept at colonising the gaps in paved driveways and patios, and they can make these areas look a mess. There are sprays containing glyphosate and other herbicides that will kill them, but what if don’t want to use chemicals?
The Which? Gardening researchers trialled some alternative control methods to see which work best.
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Best ways to control weeds in paving and paths
Full results for ways to control weeds in paving and paths
| Product name | Price | Overall rating | Initial effort on brick paving | Initial effort on paving slabs | Average effort on brick paving (months 2-5) | Average effort on paving slabs (months 2-5) | Average regrowth and germination on brick pavers | Average regrowth and germination on paving slabs | Average weedy appearance on brick pavers | Average weedy appearance on paving slabs |
|---|---|---|---|---|---|---|---|---|---|---|
| BOSTIK Cementone Wide Jointing Compound 15kg | SQUIRREL_TEXT_50020583 | |||||||||
| DARLAC DP360 Telescopic Weed Knife | SQUIRREL_TEXT_50020425 | |||||||||
| DRAPER Ash Handle Garden Tool Patio Weeder 300mm | SQUIRREL_TEXT_50020426 | |||||||||
| FISKARS Xact Weeding Knife | SQUIRREL_TEXT_50020577 | |||||||||
| Hand fork | SQUIRREL_TEXT_50020424 | |||||||||
| SIKA FastFix Paving Jointing Compound 15kg | SQUIRREL_TEXT_50017196 | |||||||||
| SPEAR & JACKSON Elements Dandelion Weeder | SQUIRREL_TEXT_50020578 |
Overall rating Ignores price and is based on: regrowth and germination (pavers and paving combined) 30%, weedy appearance of plots monthly 30%, initial effort (pavers and paving combined) 20%, average effort monthly (pavers and paving combined) 20%.
How we test ways to control weeds in paving and paths
- The trial was carried out in two areas: one laid with brick pavers, the other as crazy paving. The areas were divided into plots measuring 2 x 2m and the tools, treatments and sprays allocated to a specific plot in each area.
- We weeded the plots with the tools in late April, then weeded monthly for five months until late September. The jointing compounds were applied in late April and then weeded monthly if necessary. The glyphosate-based spray was first used at the end of April, then repeated monthly if needed up to the maximum number of sprays allowed as a control.
- Assessments were made weekly for the first four weeks, then monthly. They covered how much effort was needed to weed with each tool and method, how weedy each plot looked one month after the plot was last weeded, the amount of regrowth of weeds one month after the plot was last weeded, and how many newly germinated seedlings had come up since the plot was last weeded.
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