Comment by oldandboring
5 hours ago
As I'm sure you're aware, glyphosate is usually only appropriate as a weed killer on your property if you're looking to kill all vegetation in/around where you spray it. For example if you wanted to "nuke" your lawn by killing all the grass and starting over with new grass. It's a non-selective herbicide in this context, it kills everything.
If you've got some dandelions or thistle, and it's not out of control, the nice safe way is to pull them up by hand or, if they're between pavement cracks, pour boiling water on them.
Broadleaf weeds growing in your lawn that aren't easily hand-pulled can be killed with a selective herbicide like 2,4-d. Tough underground vine-style weeds like creeping charlie or wild violet will need a selective called triclopyr. Crabgrass is best killed by a selective called quinclorac. Yellow nutsedge requires a selective called sulfrentrazone or another called halosulfuron.
Selectively kill the weed infestations as best you can, get rid of the bad ones before they go to seed, and focus on the health of your grass -- in most parts of your lawn, healthy grass will out-compete weeds.
Don't spray herbicides everywhere (unless you're certain that's what you want or need).
Instead, just spray each weed a little bit, right above where the leaves connect to the stem.
I get a little paintbrush and paint the leaves of each dandelion with round-up - that ends up killing them but largely leaving other plants alone.
I learned to appreciate the dandelions.
How is this easier than pulling the plant out of the soil?
Dandelions are really, really hard to eradicate by pulling. The roots grow very deep, and if you don't get them completely, the plant can re-grow from what's left.
Even if you do successfully get it out, it really is going to be more work than painting a weed killer on them.
It depends on the target and the surrounding soil. It’s often easier to pull especially for the random weed that sprouts up around your landscaping. However if you are trying to manage an infestation of invasive species, where the surrounding soil will have a seed bank heavily contaminated with seeds from the years of invasive reproduction, it’s usually a bad idea to merely pull. You can expose soil to sunlight and cause an explosion of dormant seeds. And some nasty invasives are nearly impossible to remove by hand because of their root structure — some species even leave little rhizomes broken off in the soil along the root structure when you pull off the foliage causing a hydra effect.
tl;dr targeted herbicide is a much less evolutionarily selected-for offense, as opposed to hand cultivation which mimics attacks plants have evolved to survive for eons
I did much the same, but with a hypodermic syringe, on knotweed many years ago.
Yours is so much more.. tender though. Poor dandelions, but at least you made it personal!
When I really want to nuke it so that nothing grows, like in a decorative stone area, I use water softener salt. I dissolve it in a bucket of water until no more will dissolve then pour it wherever I want the vegetation to stop growing.
Anything there will die, and nothing will grow again for a long time. Although, it does spring back to life eventually. Usually once a year is sufficient.
Glyphosate is extremely effective as a targeted weed killer. It only impact what you spray it with. It does not teleport from one plant to another. It's also not strong enough to kill heathy mature plants with a small amount of overspray.