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We first bought this over a year ago (we had previously bought the same product in a 1 litre trigger spray bottle) and I have just used it again, prompting me to review it! This weedkiller claims to kill existing weeds and prevent new growth for 3 months, though if conditions are ideal then it can work for up to 6 months. It is intended for use on paths, driveways, gravel covered areas and similar, from April onwards. It can be used up to the edge of cultivated areas such as lawns, but must be kept off them unless you want to destroy it; it should not be used on any areas you intend to grow anything on as this kills ALL green plant growth.
It comes in a large 3 litre container, made from thick blue plastic. There is a handy carry handle at the top, the nozzle on the top to the left and on the right side is a pocket for the spray gun to rest (mine is yellow, not green). The front label displays all the wonderful sounding promises, along with a picture of a wilting weed. There's also a handy scale on the side of the container, with a semi-transparent strip so you can easily see how much you have left. The back label is chock full of important info on when, where and how to use as well as safety and storage details. Do make sure you read it all as pesticides can be very dangerous to yourself and the environment.
To get this ready to use, you need to set up the spray gun. Before you do this, give the container a good shake! The gun has a white tube with a red connector on the end - this you have to attach to the red part on the nozzle, then flip it up. You can choose a thin stream, medium spray or wide spray by turning the nozzle on the spray gun. To fill the gun with weedkiller you pull the white handle at the bottom of the gun slowly, hold it for a couple of seconds and then and you're good to go. There are pictorial and written instructions on both the back of the container and the gun itself.
You should use this on a calm day when rain is not expected (hard, I know!), and with the gun pointed away from your body, spray the weeds themselves and the surface of the area being treated from a distance of around 60-80cm by pressing and holding the trigger button on the gun until the spray runs out; this is quickly taken in through the leaves and kills the weeds from within (can take 10 days for this to be visible, with weed control within 3-4 weeks)
So, I didn't do that! I pulled out all the weeds I could from between the slabs of my path, and actually removed all visible signs of weeds (not all roots though) as first and foremost I needed to tidy. Once I had done all that I went around all the edges, cracks and gaps where weeds were (and theoretically could start) growing, giving a generous spray of this weedkiller; I used a whole 'gun-full' for each gap in the path. I also sprayed it over a gravel area that had weeds poking through. Happily, it acually worked! I first used it at the start of last Summer, and although we had some pretty big weed growth recently (I must be more organised with the gardens!) the quantity of weeds in the path was far less this year and my path was genuinely totally clear for over 3 months last year before it got too cold again for weed growth.
The spray gun is great, it's comfier to use as it saves your trigger finger getting tired and achy. It is a bit of a faff getting the gun full with the pull handle, sometimes it spurts a little bit and doesn't fill completely, so make sure you hold it out for a good few seconds before letting go. I think this was probably my problem as I am impatient! The spray remains even though until the gun is empty, it doesn't 'peter out' resulting in wastage.
We paid about £16 for this if I'm remembering correctly, which was better value than another 1 litre trigger bottle (I think around £8). And it worked brilliantly so it was definitely worth it in my eyes. And I still have 1 litre left; all in all I have done the front twice and the back path once, so I'll get at least one of the paths out of it again. I would definitely recommend this and I will remain loyal to this weedkiller now as I know it works really well.