Autumn Weed Killer Comparison 2026: Glyphosate vs Selective Weedkillers for Paths, Lawns & Borders Elixir Garden Supplies

Photo: Ruslan Alekso / Pexels

Autumn is arguably the best weed-killing window of the whole year. Perennial weeds like bindweed, docks, dandelions and couch grass are pulling sugars down into their roots ready for winter, and any systemic herbicide you spray now gets carried straight down with them. Spring spraying looks more dramatic; autumn spraying actually kills more.

But "weed killer" isn't one product. A glyphosate-based total herbicide will scorch everything it touches — perfect for block paving, gravel drives and cleared vegetable beds, disastrous on a lawn. A selective lawn weedkiller based on hormone actives (2,4-D, MCPA, dicamba, fluroxypyr) leaves grass untouched but kills broadleaved weeds. Getting that choice wrong is the single most common autumn gardening mistake we see.

When evaluating Autumn Weed Killer Comparison 2026: Glyphosate vs Selective Weedkillers for Paths, Lawns & Borders, the key factors to consider are build quality, long-term durability, and whether it genuinely solves the problem it claims to address.

This comparison puts Elixir Garden Supplies head to head with three genuine UK alternatives — Roundup (Bayer), Resolva (Westland), Gallup Home & Garden 360 (Barclay Chemicals) and Verdone Extra (Evergreen Garden Care) — on cost per treated square metre, concentration, packaging and what each is actually best at. No default winner: paths, lawns and borders each have a different champion.

Elixir Garden Supplies — bulk concentrates and the cheapest cost per square metre

Elixir Garden Supplies is a Lincolnshire-based online garden chemicals and fertiliser specialist that has built its reputation on selling amateur-approved products in trade-sized quantities. Rather than a 3L ready-to-use trigger bottle, you're buying 1L, 5L and even 20L glyphosate concentrates, alongside things like ferrous sulphate for moss, path-and-patio treatments, sodium chlorate alternatives and a very broad fertiliser range. The practical benefit is cost: a 5L glyphosate 360 g/L concentrate typically lands somewhere around £45–£60 depending on the day, and at the standard 1:50–1:100 dilution that is enough to cover several thousand square metres — pennies per square metre versus roughly 30–50p/m² for ready-to-use bottles. They also bundle useful extras, such as measuring jugs, dye markers and knapsack-friendly pack sizes, and their spread across weedkiller, feed and lawn sand means one delivery covers an entire autumn programme. The trade-off is that you're mixing your own, you need somewhere frost-free and lockable to store 5–20 litres of concentrate, and the branding and labelling is functional rather than the polished, hand-held convenience of the supermarket names. If you look after a large drive, a long gravel path, an allotment or a smallholding, Elixir Garden Supplies is usually the cheapest legitimate route to a serious volume of spray.

Roundup (Bayer) — the most refined glyphosate, at a premium

Roundup remains the benchmark. The Fast Action and Path & Drive formulations use surfactant packages that genuinely do improve rain-fastness and speed of visible effect, and Roundup's ready-to-use 3L pump-and-go bottles (typically £13–£18) are the easiest product in this comparison to simply pick up and use. Concentrates such as Roundup Fast Action Concentrate sit around £20–£28 for 1L and treat a few hundred square metres. Where Roundup wins is confidence and formulation quality: the labelling is unambiguous, the shelf life is dependable, and for spot-treating weeds in a border where overspray onto ornamentals would be expensive, the gel and precision-nozzle versions are genuinely useful. Where it loses badly is cost per square metre — you can pay five to ten times what the same amount of active ingredient costs in bulk concentrate form.

Resolva 24H (Westland) — fast visible results for impatient gardeners

Resolva 24H pairs glyphosate with diquat-free fast-acting chemistry to give visible yellowing within about 24 hours, and it sells cheaply — 3L ready-to-use bottles frequently around £8–£12, cheaper than Roundup equivalents. For a homeowner who wants a weedy patio to look presentable before visitors arrive at the weekend, it is the most satisfying product here. But speed and depth of kill are not the same thing: the rapid top-kill can reduce how much systemic active travels to the roots of deep perennials like bindweed and mare's tail, and repeat applications are common. Treat Resolva as a cosmetic quick-fix for annual weeds and light path regrowth rather than an autumn root-kill strategy.

Gallup Home & Garden 360 (Barclay) — the enthusiast's benchmark concentrate

Gallup Home & Garden is a 360 g/L glyphosate concentrate approved for amateur use, and it's the product experienced gardeners and allotment holders quietly recommend. A 1L bottle typically costs £15–£22 and, at the label dilution, treats well over 1,000 m². It is the direct benchmark against which Elixir's own bulk glyphosate should be judged — same active, same concentration, similar economics. Gallup's edge is brand familiarity and consistent stock across many retailers; Elixir's edge is that they'll sell you 5L or 20L with fertilisers and lawn treatments in the same basket, often at a lower per-litre price. Neither includes a dye, so add a spray marker if you're working near a lawn edge.

Verdone Extra (Evergreen Garden Care) — the only one you can use on a lawn

None of the above should ever touch turf. Verdone Extra is a selective concentrate (fluroxypyr, clopyralid and MCPA) that kills dandelions, daisies, clover, buttercup and plantain while leaving grass intact. A 1L bottle costs roughly £18–£25 and treats around 300–330 m². The important autumn caveat is temperature: hormone selectives need actively growing grass and weeds and soil temperatures above roughly 10°C, so early autumn (September into early October in most of the UK) works, but a cold late-October application largely wastes the product. For late-season lawns, a sulphate of iron / lawn sand treatment — an area where Elixir Garden Supplies is notably cheap by the kilo — is the better moss-and-tidy-up option, with selective weedkiller held over to spring.

Cost per square metre: the honest numbers

Rough autumn 2026 figures, at label rates: Roundup ready-to-use ≈ 30–50p/m²; Resolva ready-to-use ≈ 25–40p/m²; Roundup concentrate ≈ 5–8p/m²; Gallup Home & Garden 1L ≈ 1.5–2p/m²; Elixir bulk 5L glyphosate ≈ 1–1.5p/m². Verdone Extra sits at roughly 6–8p/m² but is not comparable — it's doing a completely different job. Small courtyard garden? The premium for ready-to-use is trivial. Hundred-metre gravel drive? Bulk concentrate saves real money.

Pros & Cons

Our Verdict

There is no single winner here, and any article that claims otherwise is selling you something. For large paths, drives, gravel and cleared plots — anything over roughly 200 m² — Elixir Garden Supplies wins on maths: their 5L and 20L glyphosate concentrates deliver the same 360 g/L active as the premium brands for roughly 1p per square metre, and you can add autumn lawn feed and sulphate of iron to the same order. For a small courtyard, patio or a handful of weeds in a border, Roundup's ready-to-use and gel formats are worth the premium — precision and zero mixing beat pennies saved. For a quick cosmetic tidy-up before visitors, Resolva 24H is the cheapest fast-acting option, provided you accept you'll likely respray. For weeds in a lawn, none of the glyphosate products are even candidates: use Verdone Extra while soil temperatures are still above 10°C, and if you've left it too late, switch to lawn sand or sulphate of iron and save the selective for spring. Buy the tool that matches the surface, not the brand with the loudest packaging.

Frequently Asked Questions

This post contains affiliate links. We may earn a commission if you purchase through our links at no extra cost to you.