When should I apply round up to my lawn to kill the whole thing? Right now the grass is long/ Should I cut it?

Question

Like I said, I would like to spray my whole lawn with round up and then take it all out once it is dead to apply new sod. My question is should I just spray it now with long grass or cut it short beforehand then do it. Thanks.

Answer 1

No wait until the lawn is actively growing. If it's a cool season grass like bluegrass, that will be soon. Go ahead and fertilize it to help it grow better. The faster it is growing, the better it will take up the Round up. If you lawn is a warm season grass that isn't growing right now, you'll have to wait, but you can still fertilize now to jump start it.

Leave the grass long so more foliage is out to absorb the chemical. Also, when mixing the glyphosate add a drop or three of dish soap. It's a good spreader sticker and will help keep the chemical on the plant.

Wait a day or so to water and then start up again. You want a voracious lawn munching down that killer. It will take 10 days before you can actually say, "It's working." And another week or so until you can think about removing the sod. Rent a sod cutter, it will really help taking up the sod.

Now, back to the warm season grass like Bermudagrass. It often takes a second dose. Even then we'd wait a while before we'd put down new sod. The more root or runner system you have to kill, the longer it takes.

Good luck. Remember, you must give glyphosate time to work all the way through the plant and roots.

Answer 2

I have found that if I scalp it back to about 1/2" it has a tendency to "shock" the grass and weaken it. If I then apply weed-killer to the freshly cut grass it works well to cause death. Whatever method you decide to use to kill the grass once you are ready to remove it, Rent a sod-cutter! The sod cutter will cut the grass loose from the soil so it is easier to remove. I have found that it works best if I heavily water the yard the afternoon before I am using it so that the dirt is moist but not soggy. After the old grass is cut away you can apply your favorite compost or manure and then roto-till it into the dirt. Once it has been rototilled, re-grade and compact the earth then lay out the sod.

Answer 3

NO, be sure not to cutt the grass first. Round-up tm, is a glyphosphate, it requires contact with the leaf surfaces before it can kill. Imagine poison which is contracted thru the skin. thats what glyphosphate is to grass and weeds. i is obsorbed thru the pores of the eafe where transpiration takes place. then as the round -u travels thru the xylem and phloem, it reaches the roots, where it releases its deadkly power and kill the roots and root hairs. Once this happens, there is no longer any life support for the weed. So, please, dont cut the grass first, because it would not be as beneficial.
God Bless

Ps. if you have any questions regarding this, feel free to IM me at salvationevangelsimjesus.

Answer 4

first, cut to 2-3 inches in length.
Second, ALL herbicides work best when the plant is in full growing mode. In other words, weed and grass killers fail dismally when applied in dry weather or when the plant is dormant due to the season. If you apply when is it hot and humid.....you can almost watch the plants die as the poison goes on. (which brings up another point....watch out for wind....any plants in your landscaping or vegetable garden that are down wind will die as well)

Answer 5

Apply the new sod over the top

New sod will kill the old growth

The old growth will supply some fertilizer for the new growth

Answer 6

I did this before and the problem is if you cut it and don't remove the mulch then the round-up may not make it to all of the roots.

Answer 7

you'd have to cut it first