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The right time to lay down a crabgrass pre-emergent

Discussion in 'Turf Renovation' started by james_stewart, Feb 19, 2009.

  1. james_stewart

    james_stewart LawnSite Member
    from oregon
    Posts: 6

    I have a few questions about the crabgrass prevention.

    I live in the Pacific NW (Portland, OR)

    As far as I understand you have to apply a pre-emergent in spring when the soil temperature is around 50-55 degrees.

    I'm not too sure how to know when my soil temp is between 50-55. What's a good indicator, and how long after the soil hits 50-55 will the crabgrass germinate?

    Would it benefit me to do it a bit earlier, then again in May? The temps will be in the mid 50's all week with rain.

    Where can I find a good crabgrass pre-emergent? Homedepot only has a combo Scott's fertilizer and crabgrass control, should i find a product that works only as a pre-emergent? I've heard of a product called dimension, but have no idea where to buy it.

    thank you for you help
     
  2. james_stewart

    james_stewart LawnSite Member
    from oregon
    Posts: 6

    I just found a local garden shop that sells a product called HiYield that contains Dimension. Has anyone heard of this product?
     
  3. NEW CITY LAWN CARE LLC

    NEW CITY LAWN CARE LLC LawnSite Bronze Member
    Posts: 1,268

    If you have an Ewing Irrigation store in your town, go there and ask for their BEST brand fertilizer with Dimension it will prevent the crabgrass.
     
  4. james_stewart

    james_stewart LawnSite Member
    from oregon
    Posts: 6

    HA! found them across town, but they told me I couldn't purchase that product because I'm a homeowner and need a license to purchase from them.
    They recommended I try finding a product at homedepot....:mad:
     
  5. NEW CITY LAWN CARE LLC

    NEW CITY LAWN CARE LLC LawnSite Bronze Member
    Posts: 1,268

    Well, I guess you've just become Stewart Lawn Care, LOL, I've had fairly good success with the scott's product, its a little pricey, but works.
     
  6. tombo82685

    tombo82685 LawnSite Senior Member
    Posts: 288

    A good indicator of when to put down a pre emergent is when the forsythia blooms. Im not sure you have these in Portland area, but thats a good rule of thumb. If you do it to early you wont get protection throughout the whole season assuming you get your first frost in october or so. Im not sure of your climate but i know in PA by may crabgrass has already germinated so putting a prem emerge then is useless, but it may be different. Pre emergent usually has about a 4 month barrier of protection
     

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