How to Tackle Crabgrass and Nutsedge

Posted by Green Acres Nursery & Supply on Aug 2, 2017 5:31:47 PM

It's Time to Get Ahead of Crabgrass and Nutsedge in the Sacramento Area

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We've had many questions about how to treat—okay, annihilate—crabgrass and nutsedge that's popping up all over right now. We have a few tried-and-true solutions for you. 



More About Crabgrass
Crabgrass is pretty familiar to most of us. It comes in a few forms. The main thing to know is that crabgrass is an annual weed. That means that it will pop up in the summer, set seed, and die within the year. The seeds are then ready for another round next summer. 

Can't identify your weeds? Bring a sample into one of our locations and we'll identify them for you. 

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Two-Step Process for Treating Crabgrass
Because the weed is a summer annual, that can be in a few stages of its lifecylce now, there are two ways to treat. First, kill the existing weeds, and second, prevent the seeds, that are set, from germinating. Ideally, you would pull the weeds by hand before they set seed. And while that's a great practice, you may be a little behind and need some help. 

  • To kill the existing weeds, we recommend Bonide® Weed Beater Plus® Crabgrass. It's a broadleaf weed killer that targets a number of weeds—over 200 to be sort of exact—and kills them to the root.  ROP_Crabgrass_Preventer.jpg
  • Now you're left with seeds. Seeds have time to germinate now, and others will germinate as soon as spring soil temperatures hit around 50°F.  The seedlings will continue to grow into fall. Don't be fooled though... Crabgrass seeds can maintain their viability for three years. That means that you should treat now and again in spring by applying a preemergent, and continue the practice each year. Our favorite is Bonide Crabgrass & Weed Preventer. It's easy to use and works in flower beds too. 

More About Nutsedge
Nutsedge is a perennial weed that spreads by rhizomes (underground stems) from tuber. So, once the leaves die back, the plant continues to grow under the soil. Then when spring soil temperatures are around 45°F, the plant will begin to pop up again. There are things you can do to mitigate the growth of nutsedge, and we have a product to help you.US-Ortho-Nutsedge-Killer-For-Lawns-Ready-to-spray-9901910-Main-Lrg.png

  • Avoid soggy soil, and adding contaminated soil to your landscape.
  • Pull the plants as soon as you see them, getting the entire tuber and any rhizomes attached. That might require digging at least a foot into the soil.
  • Consider adding a layer of thick, woven landscape fabric under your mulch. 
  • And one of our recommendations for herbicidal control is Ortho® Nutsedge Killer.  You can connect it to the hose and spray without having to mix anything.  

As with the use of any chemical control, read the label. There will be good information about safety and the recommended conditions for application (including temperature) to avoid problems. 


By understanding a little more about weeds, it's easier to control and treat them. In fact, you might be ahead of it next year!

Stop by any of our locations to get your weeds diagnosed and our recommendations for treatment. 

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Topics: Weeds, Weed Prevention, Nutsedge, Crabgrass

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