6 votes
Accepted

What are the benefits of solarization?

Solarization is a combination killer by smothering and intense heat. This may work to kill your crabgrass, but some of it may still survive even this harsh treatment. Crab grass may even grow through ...
  • 6,336
4 votes
Accepted

Getting Rid of Crabgrass

As you can imagine, the topic of crabgrass has come up a number of times before in this forum. A couple of highly voted answers which may be relevant to you are this one and this other one. Crabgrass ...
4 votes

How long should I wait after overseeding, before I apply pre-emergent weed preventer?

The pre-emergent used in that product is Pendimethalin (3,4-Dimethyl-2,6-dinitro-N-pentan-3-yl-aniline), and its mode of action is microtubule assembly inhibition in very immature plant shoots (In ...
  • 51.5k
4 votes
Accepted

My yard is being taken over by crabgrass. How do I get rid of it?

I come at things form an organic landscaping background, so we don't go for pre-emergents, which would prevent it from germinating next year. With that in mind, your goal is to grow the the turf grass ...
  • 6,977
3 votes

Lawn border to stop grass growth

I have dug trenches everywhere between the edges of the landscape beds/walks and the lawn. This does get tedious, but next time I am going to dig a trench deep enough to lay down galvanised square ...
  • 31
3 votes

What's an organic way to discourage crabgrass from a large "lawn"?

Corn gluten meal (CGM) which is a byproduct of some corn processing methods and can be attained very cheaply in a raw form from a grain mill, or purchased for quite a bit more money as a “natural / ...
2 votes

How can I remove crabgrass from a Zoysia lawn, and flower beds?

Re the flowerbeds, yes, you need to dig them over and extract all weed roots, preferably without leaving any behind. The guy at Home Depot's advice was incorrect though - if you want to use Round Up, ...
  • 130k
2 votes

Pull Crabgrass before overseeding?

If your lawn is almost ALL crabgrass then glyphosate or roundup is indicated. This is absorbed by the foliage and taken down into the roots where the KILL happens. Takes at least 3 weeks. Perhaps a ...
  • 39.9k
2 votes

What is this? Not: crabgrass, fescue clumps, quackgrass? Course and bright yellow?

First and last picture looks like a clumping/coarse fescue. Very common in northern blended turfs. Even TTTF will begin clumping heavily under stress and may need thinning (scarifying) and reseeding ...
  • 21
1 vote

Issue with grass that has a lot of crab grass. What do I do?

I would wait until next spring an put down pre-emergent crabgrass herbicide. It will not affect perennial grasses.
  • 7,971
1 vote
Accepted

Will my Kentucky Bluegrass die if I let nature have its way?

There's a lot to unpack here, but i'll give it a shot. Is there any real harm if I just let Crabgrass take over 100%? It tends to form clumps that leave exposed soil between them; not a uniform look,...
  • 204
1 vote

Help with this grass

Based on the timing of the grass's appearance, its color, the alternate/nearly paired arrangement of its blades, and its form, you have crabgrass. The base of the grass's blades is often a purplish ...
  • 14.4k
1 vote

Will pre-emergent kill new wildflower seeds

Pre-emergent weedkillers work by disrupting the root growth of newly germinated seeds, so that the seeds germinate and then die. The length of time it stays active in the soil depends on the ...
  • 11.3k
1 vote

What are some ways to dig up the wild grass and level the area?

If you are only looking to dig out the weed grasses and other weeds, its easier if the soil is damp or moist, number one, and number two, use a garden fork, one with a long handle and 4 tines (like ...
  • 130k
1 vote

What are some ways to dig up the wild grass and level the area?

Unlike spades, shovels are not designed for digging. If you want to do it by hand, use a tool with a sharp straight blade, not a curved shovel blade which can never cut to an even depth. And don't use ...
  • 11.3k
1 vote

Crab grass along margins of lawn

Two things to consider here: the type of soil close to your hard surfaces and temperature and humidity in the two microclimates. Basically nature is just doing its job here, selecting the most ...
1 vote

Boiling water to kill weeds?

Instead of trying to kill the weeds as is, you could think of them as future fertilizer. Get some cardboard or newspaper, lay it on top, and start "lasagna gardening" by putting compost on top of that....
1 vote

Is there a selective herbicide for crabgrass that can be applied during high temps?

Cool season grasses are far easier to control weeds just by the height of the crop and training the roots to grow deeply and be drought tolerant. You don't have that ability. Spring pre emergence ...
  • 39.9k
1 vote

How can I remove crabgrass from a Zoysia lawn, and flower beds?

For your lawn: You can use a selective herbicide to target the crabgrass. Make sure your product is safe to use on Zoysia. I use Quinclorac based herbicide, because I find that Zoysia is highly ...
  • 51.5k
1 vote

How can I remove crabgrass from a Zoysia lawn, and flower beds?

I am glad you asked us rather than listen to True Green and Home Depot. My goodness! Please PLEASE forget that plastic membrane!! Please. It is one of the dumbest things us humans have done...I've ...
  • 39.9k
1 vote

How soon can I apply pre-emergent herbicide after a dormant overseeding?

There are several modes of action in pre-emergent herbicides, but they all have one thing in common, which is targeting young, immature plants that are still dependent on the parent seed. From my ...
  • 51.5k
1 vote

How soon can I apply pre-emergent herbicide after a dormant overseeding?

It's tricky dormant seeding and then waiting for seed to germinate to put pre-emergent down. If it is warm enough for the new seed to germinate, it's warm enough for crabgrass to do the same. A ...
1 vote

Should I bag lawn clippings from a crabgrass-infested lawn?

From my experience here in Indiana (land of weeds), the only way to really get rid of the crabgrass is to pull them up by the roots, one by one and throw it in the trash. It will leave divots and the ...
  • 11

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