Organic Weed Killer that works?

[Biciclista]

and for something really awful, use bleach (like blackberries growing out of a crack in the rocks). You'll have to repeat applications, but even a blowtorch didn't kill this stinker.

[salsabike]

I was told by a landscape gardener that Burn Out II was relatively benign. It has clove oil, citric acid, and sodium lauryl sulfate. However, this gardener also thought Round Up was not a big deal. I did use the Burn Out and it worked fine, and my hope is that she is right about it being relatively benign.

There are some weed situations where hand pulling is very difficult or has a really low success rate--in cement cracks, in gravel, etc.---when you can't get the root out. I expect that's why the OP was asking.

[Aquila]

I use some salt on the worst weeds in my driveway. Compared to the amount of salt on the roads around here in winter, my few tablespoons can't be too dangerous, I hope.

[sgtiger]

Also, what mix of vinegar to water?

Lisa

Full strength and it works best if it's done on a sunny day. Re-apply after any rain until the weed is gone. If regular table vinegar(>5%) doesn't work, you can get a stronger solution of acetic acid(~10%) at gardening centers. Remember to read the directions for it and take the necessary precautions.

[tulip]

You can really get those weeds out, roots and all, with the dandelion weeder that Bleeker showed. And you really will have to do it only once in a big way, and then keep up with it every few months. It also has the benefit of providing instant gratification. You have to wait for the vinegar to work, if it works at all.

I'll use RoundUp on poison ivy, but that's it.

[divingbiker]

For the weeds that grow between the cracks in my brick sidewalk (where a dandelion puller won't fit), I use a 5-in-1 painter's tool. The hooked end grabs the weeds and pulls them out. It's oddly therapeutic when I'm in the right mood.

[newfsmith]

Full strength and it works best if it's done on a sunny day. Re-apply after any rain until the weed is gone. If regular table vinegar(>5%) doesn't work, you can get a stronger solution of acetic acid(~10%) at gardening centers. Remember to read the directions for it and take the necessary precautions.

Or you can boil the vinegar and pour it on. It works well on our patio between the pavers.

[Jolt]

and for something really awful, use bleach (like blackberries growing out of a crack in the rocks). You'll have to repeat applications, but even a blowtorch didn't kill this stinker.

Blackberries? That sounds like a not-so-awful weed to me!

[Biciclista]

Blackberries? That sounds like a not-so-awful weed to me!

when blackberries (the Kudzu of the Pacific NW are allowed to grow, they can cover your car and your house and all of your property. Their roots go down several feet. Once they're in a rock wall, they're there forever.

[spokewench]

blowtorch?

[Norse]

Anybody have any ideas for Creeping Charlie? Our former neighbor, a sweet but eccentric old lady, thought that the purple flowers of Creeping Charlies were "just lovely" so she let it go wild in her yard and of course it spilled over to ours, which is now hopelessly infested. I am thinking we might have to tear out the yard and start over. We live uphill from a pond so I never use anything harsh.

[Jolt]

Biciclista--

Yikes!! Those plants are out of control. Now I see what you mean...talk about too much of a good thing!

[NbyNW]

I've heard of people pouring boiling water slowly over dandelions that come up through the cracks in driveways and other paved areas. I think I tried it once, and I don't remember giving the weeds a second thought in a long while.

[short cut sally]

I use boiling water with a good helping of salt. you may have to repeat a time or two.. works for me

[GLC1968]

Goats?

And since I moved from Kudzu central to blackberry central - I can say with all confidence that the blackberries are WORSE because they are extremely painful. The thorns are like little barbed knives and they go right through heavy leather work gloves!