Roundup doesn't seem to work on these weeds...Help! (flowers, landscape, grass)

[thedwightguy]

D9 Cat with a wide angle blade and teeth.

[luv4horses]

For optimum performance, apply round up when the weed is growing and young. Roundup will not work if the weed has not appeared, if the weed is dormant, or if the plant is so mature that it has strong food reserves already. Perhaps these weeds had not germinated when you used the product.

[TinaMcG]

Originally Posted by suzy_q2010

To add to Tina's suggestions, another thing you can do is add a few drops of liquid dishwashing detergent to the Round Up. It's a surfactant and helps break down the leaf barriers to absorption of the Round Up.

Oops, forgot that part. You're right, that helps. Thanks!

[TinaMcG]

Originally Posted by suzy_q2010

It'll only kill 10% of it?

OMG, good one, Suzy.

[TinaMcG]

Originally Posted by 11jay11

I just bought it (Roundup extended control) gallon from Loews on Monday.

Do you think it's a good idea to add a few drops of liquid dishwashing detergent to the Round Up.??

If it's ready to use, check the label to see if it already contains a surfactant. If it does, don't add anything.

[kinkytoes]

In lieu of spraying chemicals on the lawn in ever-increasing doses to try to kill the plant, I'd try pulling it up or mowing it. It rains frequently in Florida, and spreading herbicides may not be the best idea.

[11jay11]

I'll check for the "surfactant" tomm and take a couple better pics........thx.

[davidv]

Maybe it's Garlic Mustard.

According to this site, it is quite the problem and hard to eradicate.

[StealthRabbit]

If it is green... Round-up should kill it. As mentioned, get it while it is young, and in the morning when it just starts waking up.

Add the surfactant AFTER you have mixed chemical in sprayer. Many leaves are waxy and bead off sprays.

Round-Up is not systemic, and you can drink it (Tho that is not a 'labeled use' !!!, so you will go to jail instead of hospital)

Use ALL chemicals wisely.

[wit-nit]

Glyphosate (Round-Up) (N-(phosphonomethyl)glycine) is a broad-spectrum systemic. The warmer the weather the faster it works. It is absorbed into the foilage and works it's way down, through the moving cells, to the roots killing the plant at that time. There is no residual effect to the soil.
On nutsedge I use full strength on the weed and usually in 1-2 days its dead.
Round-Up Ready to Use is the weakest mixture you can buy, it could take several applications on more mature weeds than young ones. I buy the concentrate and mix my own strengths to the type of weed being killed.