I use this and it works quite well.Currently dealing with horsetail, it's an absolute nightmare apparently the root systems can be meters underground
We have it through our lawn as well so don't want to use the nuke method but this is what works for us.
https://www.amazon.co.uk/Vitax-Brushwood-Killer-Tough-Weedkiller/dp/B000TAW2Z2?th=1
SBK Brushwood mixed as per the instructions in a backpack sprayer with a massive squirt of washing up liquid which helps it stick to the plant.
I spray loads outside the fence, in the hope it damages it a bit underground.
But as you say, it's meters under, so never going to get rid of it completely
Last edited: