I had been looking for an organic solution for a long time and finally experimented this past week.
Ingredients to produce 1 gallon sprayer-full of the organic weed killer:
1 gallon white vinegar
1 cup salt
1 tbsp dish soap
To get a gallon the cost is around $4.50:
Vinegar — 1 gallon is $2.50 at Target
Salt — 1 Morton Salt container for $1 at The Dollar Store
Dish Soap — $1 @ Dollar Store
The 1 gallon garden sprayer is from Amazon.com and with my Prime membership was only about $10, including shipping. Works great!
BTW…one sprayer-full of the organic weed solution covered both my front and back pathways.