So many weeds - question about horticultural vinegar

[lighter]

I'm trying sosososososososooooo hard not to use any chemicals in my yard. 

Soon I'll put out corn gluten to stop some seeds from sprouting, AND my moss garden is enchanting and verdant in some very large areas, BUT I notice how many weeds are coming back, or sprouting up new.  My back right now is aching, and I don't know that I have the physical stamina to continue the way I've been going.   I know things will get easier BUT, I'm not sure it will be easy enough, soon enough.  Things ARE easier, just not easy enough. 

Has anyone ever used 40% vinegar on weed or grass root systems?  (Regular vinegar is about 7%.)  Vinegar kills moss, AND all other green leafy things, but not the roots when applied to the plant,  so I can't use it above ground.   The question is, can I squirt it into the root system of grass, and weeds, and actually kill the weeds?

Thoughts?

[sKePTiKal]

Never used it Lighter. But I do know that weeds have all different kinds of root systems and spreading techniques... so, it might not work on all of them.

[Hopalong]

I use it all the time, Lighter. First try 20% hort. vinegar-80% water as 40%-60% is stronger than needed for most weeds.

Pick a sunny day that should stay that way.
Spray the weeds, saturating leaves.
Watch what happens.

Note: It's hell on sprayers so rinse the sprayer out with water afterward.

I use it on my gravel driveway which didn't get a weed liner as it should've, and it works in hours.

hugs
Hops

[lighter]

I can't spray bc if the Moss.  What I can do is sponge on leafs and maybe inject into root systems, bc vinegar kills my Moss too.