Roundup is a brand, not a product. There are several products carrying the Roundup brand, one of which is an extended control herbicide.. Like the Ortho stuff I mentioned earlier, it kills existing weeds and then sticks around for several months to prevent new weeds from growing.
If salting the earth keeps plants from growing, how do the Dutch farm all that land recovered from the sea? It would have been permeated with salt.
I suggest watering the area with Brawndo.
Salt, as in NaCl, can be washed out of soil with rainwater, or irrigation. If you want dead soil, you need to salt with something that mostly stays in place during watering, such as borax.
I thought that’s what my weeds craved.
I’ve heard rumors that vinegar can be used as a herbicide, and it’s cheap to boot. I’m not certain whether you need to mix it with water or apply it directly, but it’s worth a shot.
I doubt it’ll prevent weeds, though. It’s probably got the same limitations as Roundup.
I was going to post about vinegar. It is my go to herbicide for areas where I don’t want anything to grow (and it has the benefit of being reversible with application of lime) I find it lasts longer than glyphosate (which really doesn’t have much residual effect) is cheaper and I don’t have to worry about spray getting other plants (I tip it straight from the bottle where I want).
I also like using boiling water for instant results and will use both - boiling water and then vinegar.
If your drive/patio is on a slope directed towards your house then on a nice rainy day you’ll have a better surprise. That’s why we haven’t placed it down.
It’s not banned in the UK, and we’re in the EU. Might be banned some countries, but not here 
Have you ever added dish soap to the vinegar?
I just read a website recently that discussed using vinegar as a weedkiller. Apparently, a little dish soap added to the vinegar makes it more effective, as it causes the weeds to absorb more of the solution.
Regular vinegar is okay, but if you’re a “salt the earth” type (which it appears you are), you may want to pick up some horticultural vinegar. Regular white vinegar is about 5% acetic acid; horticultural vinegar is 20-25%. Don’t get it on your skin, it stinks way more than regular vinegar and could burn you.
A small thermonuclear device would probably do the trick.
I know, and it would probably take care of the mouse problem, too. But Mr. Neville whines so when I bring up that idea.
From orbit, I hear is the only way to be sure no weeds will grow there again.
Your problem isn’t so much that there are weeds as that there are cracks for the weeds to grow in. Is there a lazy-dude way to fill in the cracks semi-permanently so your enemy has no ground to go to?
zombie weeds cannot be killed…
In ancient times, salt was a very valuable commodity-wars were fought to secure supplies of it. So I kinda doubt accounts of the Romans buring Carthage, and then spreading salt on it .
Seems like a hyperbole to me.
FYI, Cecil was skeptical of such stories as well, in this column.
My first re-animated thread!
I’ve been doing this over the past few years by vigorously sweeping away the weeds with a stiff push broom and sweeping in new limestone screen. Once in the spring and maybe once over the summer. Seems to do the trick. Pretty cheap and not bad for the environment.
K bro salt will work an is not harmful to the enviroment all herbacides are bar none they are all harmfull because they are petrochemical based. So yes salt will work you can raise the ph to intorlabe lvs but to fix ur probs u need to drill the cracks add a lil salt in the whole an use high strengeth concreate with a tile mortar that fits the color cheers from the dumb farm boy