Clearing weeds in driveway

[Runner]

My state DOT recommends Imazapyr for control of weeds along the edge of the road but for some reason retailers do not sell a concentrate and Amazon won't even deliver. When I was out of state last year I ordered a quart so I have that. I'm going to mix glyphosate with imazapyr and spray with a sprayer mounted to my lawn tractor. I usually mix 1.5% (2oz/gal of roundup power max).

Last year I found a somewhat concentrate imazapyr/glyphosate mix at walmart that seemed ok at best. I added that to my glyphosate mix (don't remember the ratio I selected) but didn't like using the backpack so looking forward to the mounted tractor solution.

I think I'll try your mixture on my 600 foot drive. Current method is spray it good with glyphosate mix in the tow-behind sprayer, wait a few weeks to see what's left, then go back and spray anything that's still green with the same stuff in the hand sprayer. As mentioned, doesn't keep new stuff from coming back, but if I can get everything cleaned out once, then there's a chance I can keep up by just occasional spot-spraying and pulling weeds. Unfortunately, this year I let it go much longer than intended, so kind of had to start with a big mess.

I'm using this rig, with an old PCU side panel to block the spray on one side along the driveway edge. I have found this works very well.

Same area 1 week later.

My experience has been that the less disturbance of the gravel, the better. Rearranging the gravel tends to make it wash easier and also seems to make the weeds sprout even faster for me.

 

[kenmbz]

I use RM43 and it keeps everything I spray down for a few months.
Takes a while to work , but it does.

 

[bkenobi]

Everything died and hasn't tried to come back. I wanted to get the dead moss out so i hooked the dethatcher up and broke everything up. That may be a mistake but I'll know for the future. Right now it looks amazing!

 

[Santa Craig Cringle]

Muriatic acid, also known as hydrochloric acid, is sometimes used in well water systems for well rehabilitation to improve water flow. It can dissolve mineral deposits, iron and manganese oxides, and other substances that can clog wells. However, it's a strong acid and requires careful handling and safety precautions.

Used in swimming pools also.