Getting rid of crabgrass?

Question

What is the best way to get rid of crabgrass?  Is it something that needs to be done every year or is there a permanent solution?

Answer 1

There are many different weeds that may be categorized as crabgrass.  It is important to try to identify the weed before trying to treat it.

Having a lush healthy lawn will also prevent many problems.

1- Aerate your lawn - Aeration will open the soil to air, water & nutrients to allow your natural grass to grow much better.

2- Fertilize in the fall and spring to promote a thicker denser lawn.

3- Depending on your climate, water generally watering a lawn deeper and less frequently will prevent germination of crab grass seeds.

4- Mow to leave grass a bit longer.  Most crabgrass species grow best in lawns that are cut short.  A longer natural grass shades the seeds of crabgrass and helps to prevent their growth.

5- Use a crabgrass treatment product.  This should be done in the early spring to prevent the initial emergence of the crabgrass.  Often waiting to long to apply these products will make them ineffective.  These products can often be purchased online at a discounted price.  Label instructions on these products will give recommendations for application.

Answer 2

Crabgrass is not a perennial, but rather an annual grass, meaning that it does not live over the winter and that each spring all the Crabgrass that you have in your lawn has grown from seed from last year's crop.  By contrast, Twitchgrass is virtually self-sterile and grows only from very prolific rizome roots.  These differences are important when attempting to eradicate weed grasses, because it narrows down the best methodology.

Because Crabgrass produces literally thousands of seeds from each mature plant, pre-emergence chemcial treatments are at best, a control, a means of reducing the onslaught of the current year's growth and, in fact, create more of a problem in leaving one with the hope that it will actually eliminate Crabgrass.  After attempting such a control, year-over-year, it becomes abundantly clear that the Crabgrass is so prolific that despite the pre-emergence applications, the Crabgrass is quickly and completely replacing all the desirable grass in the lawn.

Other than pre-emergence controls, there is no other method of killing Crabgrass that will not also kill all other grasses in your lawn.  Therefore, the reality is that the only way to eliminate Crabgrass is by first completely killing the whole lawn area in which it resides, with a herbiside such as Roundup and then, as quickly as possible, so as not to allow other weed seeds to take over the open soil area, reseed the whole lawn using at least twice as much seed as is recommended for growing a new lawn (seed needs to be racked into good soil, along with starter fertilizer and kept well-watered morning and evening until germinated).

By far the best time to do this is early fall (depending on growing zone - last August to early September) when weed seed germination is at its lowest and the summer drying heat is past, but with sufficient time before winter to allow for good germination.

The next thing to understand is that Crabgrass will be at its height in seed production in early August, right at the time when you need to be killing it with Roundup, but take heart, my experience is that despite the hundreds of thousands of seeds in production at this time, if you drench it with Roundup, it also kills most of the seeds, which is the primary reason  why simply killing all the grass - along with all its seed production - is really  the ONLY way of really getting control of a bad patch of Crabgrass.  So get on with it and then simply reseed and check the next spring (late May/early June - before the seed forms) for young Crabgrass sprouts that will inevitably have dodged the Roundup and meticulously hand pull (very easy when young) each sprout you see.  Repeat this spring process ever year and throughout the summers until you see no more Crabgrass.  And yes, that process, tedious as it is, absolutely does work!  Best wishes for your success!!

S. Moore

Answer 3

I have several kinds of stickers, regular and small flower kind of weed, I think is called samdsper weed.  How do I kill both but mostly samdpser?

Answer 4

I have brown spots on my lawn that have a little green part in the centre.  I dug up a section and didn't see any grubs, I did however see tiny wee worm like  bugs, dark brown in colour and they are tightly wound.  Do you think that they could be the problem?  The brown part appears to be completely dead.  I live in Ontario.

Comments

That sounds like grub worms...............

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not necessarily grub worms  but rather a larvae of another species, all larvae do basically the same thing...

Answer 5

We have this strange weed taking over part of our yard and invading my vegetable garden.  We went through the drought in Indiana last year and I do not remember seeing this weed before.  It is a runner type weed with little dark green leaves with wine colored spots on them, it also has little light orange flowers that bloom.  It is a real nuscience and the only way I know to get rid of them without hurting my plants is to pull them up.  Could you please tell me what it is and how to control it.  Thank You

Answer 6

if you use weed & feed according to directions......................and use a bag to catch the grass & weeds to keep them from coming back.....my neighbor uses this method and their grass looks like a golf course.

Answer 7

have 10ft diameter circle of clover and violets help me to get rid of them  PLEASE!!!

rinneanna1@comcast.net

Answer 8

How do I use Baking Soda to kill Crab Grass?

Answer 9

single blade grass with 1 to 5 round spiky seed pods?

Answer 10

We are found a chemical for grass remover in quantity basis for supply.

Answer 11

The unwanted plants which grow along with crops is known as weed.They also compete with crop for their food . In this way plant donot get sufficient amount of food and they die.

Answer 12

can i find a yard supervisor vacancy from there?

Answer 13

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Answer 14

I have a back yard full of weeds , i want to kill the weeds and grow a lawn and garden what is the best method

Answer 15

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