Price: £46.49 - £29.49
(as of Jul 11, 2025 06:21:37 UTC – Details)
From the manufacturer
Kills tough and woody weeds
Concentrate formula for controlling tough weeds such as brush weeds and Japanese knotweed.
Kills right to the roots
Travels through the leaves straight to the root to prevent weeds from growing back or regenerating.
Results in 48 hours
Our fast acting formula means visible results in just 48 hours, working right in front of your eyes!
Degrades naturally in soil to allow replanting
Degrades naturally in soil leaving no residue, meaning you can start replanting in just 7 days.
1 Kills Tough/Woody Weeds
2 Kills To The Root
3 Results In 48 Hours
4 Replant In 7 Days
Tough and effective weed control that gets to work within hours of application
ROUNDUP Ultra is a concentrate formula for controlling tough weeds. It is a systemic weedkiller which kills tough weeds to the roots. It is ideal for treating large areas of weeds.
Works on brambles, thistles, nettles, dock, couch grass and many more.
The glyphosate formula is naturally broken down in 7-8 days by micro-organisms in the soil so you can get planting again.
Why should I use ROUNDUP Ultra Tough Concentrate Weedkiller?
ROUNDUP Ultra is a non-selective weedkiller that is absorbed by leaves and freshly cut, woody surfaces and moves throughout the entire plant, above and below ground, to control annual and perennial weeds, including grasses and deep rooted weeds.
Where can I use ROUNDUP Ultra Tough Concentrate Weedkiller?
Controls annual weeds and most perennial weeds and trees around the garden and on areas not intended to bear vegetation such as hard surfaces, patios, drives, tarmac, paths and gravel areas. It can be used to clean up weedy ground before planting.
When should I use ROUNDUP Ultra Tough Concentrate Weedkiller?
Apply as a foliar spray to weeds and saplings at any time when the weeds are actively growing and have adequate leaf area to absorb the spray. Avoid spraying when rain is imminent.
How do I use ROUNDUP Ultra Tough Concentrate Weedkiller?
Add the correct dilution of concentrate to water in sprayer, following the pack instructions. Spray to lightly wet the leaves whilst avoiding run-off. Weeds show effects within 1-4 weeks. Dead/dying weeds can be dug in without harming future plants.
Is ROUNDUP Ultra Tough Concentrate Weedkiller safe to use on areas used by children and pets?
Keep children and pets out of treated areas until dry. Keep out of the reach of children.
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Customer Reviews
4.4 out of 5 stars 1,372
4.4 out of 5 stars 4,839
4.4 out of 5 stars 1,372
4.4 out of 5 stars 15,275
4.5 out of 5 stars 1,350
4.1 out of 5 stars 237
Price
£49.99£49.99
£5.94£5.94
£49.99£49.99
£6.00£6.00
£35.99£35.99
£6.00£6.00
Ready to use
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Fast-acting
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Within 1-2 days
Within 2-4 days
From 1 hour
Naturally breaks down in soil
In 7 days
In 7 days
In 7 days
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In 7 days
In 1 day
Kills weeds to root (systemic)
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Allows replanting
In 7 days
In 7 days
In 7 days
In 7 days
In 7 days
In 1 day
For beds, borders, veg patches
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For paths, patios, drives
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For tough weeds
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For tree and shrub stumps
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Super concentrated formula for killing tough weeds
Ideal for treating large areas of weeds
Systemic weed killer, kills tough weeds to the roots
Degraded in soil by micro organisms
Contains glyphosate
Customers say
Customers find the weed killer effective, with one mentioning it works perfectly on brambles infestations, and many noting it completely eliminates weeds. The product receives positive feedback for its quality and ability to control weeds, particularly on paths and terraces, with one customer mentioning it lasts up to ten years. While some customers consider it good value for money, others feel it’s not worth the cost. The product’s duration receives mixed reviews, with one customer noting it takes around 4-5 weeks to kill weeds completely.
