•Water, from adding none to having the mix be 99% water; and using cool, lukewarm, warm or hot water;
•Other additions: gin, bourbon, citrus oil.
However, vinegar, salt, soap, oils and alcohol might kill other vegetation as well. Your best bet is probably to go to Lowes, Home Depot or a garden center and purchase an organic weed killer.
I have tried vinegar and a couple of organic weed killers. They all only work temporarily, I"m sorry to say. Not sure if the soap, salt and other things work any better. I haven't found a good organic alternative other than just physically pulling weeds.
Good info from Dan and Yamini. Nothing is permanant unless you contaminate the soil. Temporary is all we should hope for. Mulches can slow the growth process, allowing us to stay ahead of the weeds, if we're diligent.
Picking the weeds before they can set seed cuts back on their population. Mow your lawn often to cut the weeds before they bloom. I collect my lawn clippings for this reason.
If you are just trying to kill everything, several layers of newspaper covered by several layers of mulch should do the trick. Worked great for me. The grass didn't come back. Of course, weeds did, but they are relatively manageable.
I'm not sure how much or how long you are trying to kill what ever it is but copious quantities of salt in the soil will prevent growth of anything in the area for years. Read up on what the Romans did to Carthage and you will get the idea.
Here are a couple of the recipes for homemade weed killer that I've heard of:
•Vinegar, from 1 tablespoon per gallon to full strength;
•Salt, from adding none to adding 1 pound per gallon;
•Soap, from none to 20% of the mixture; ...»
•Water, from adding none to having the mix be 99% water; and using cool, lukewarm, warm or hot water;
•Other additions: gin, bourbon, citrus oil.
However, vinegar, salt, soap, oils and alcohol might kill other vegetation as well. Your best bet is probably to go to Lowes, Home Depot or a garden center and purchase an organic weed killer.
Picking the weeds before they can set seed cuts back on their population. Mow your lawn often to cut the weeds before they bloom. I collect my lawn clippings for this reason.