advice please

Discussion in 'Turf Renovation' started by ctSeb, Aug 29, 2010.

  1. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    I don't believe that is possible... I bet it isn't started yet, even in full sun areas... anyone else in the NE have CG germination???
     
  2. JFGauvreau

    JFGauvreau LawnSite Bronze Member
    Posts: 1,297

    Dandelions and CG are in full force sine 2-3 weeks ago.
     
  3. mdlwn1

    mdlwn1 LawnSite Silver Member
    Posts: 2,443

    I have pics..just not sure how to upload from phone. 3.5 weeks ago only in sunny unimproved areas...sunny maintained turf was over 2 weeks ago. Forsythias had barely opened.
    Posted via Mobile Device
     
  4. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    Some pictures would be nice... I see on the soil tempeature map, that we are about in the same range...
    If I have germination I can't see it yet... How large are your CG plants right now?
     
  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,914

    That is odd. Are you sure its crabgrass--not knotweed?
    According the the soil temperature map you are colder than we are--and I have not seen any sign of crabgrass yet (expect it soon).
    http://www.greencastonline.com/SoilTempMaps.aspx

    Do you know your GDD base 32? (Growing degree days, base 32). According to Michigan data, crabgrass should be treated by 800 GDD(base 32).
    http://gddtracker.net/?model=10&offset=0&zip=49508
    Be sure to click "Crabgrass PRE" on the right side of the screen. Put in the zip code of East Lansing, 48823, and it allows you to see the full data.
    However it is confusing in spots. For Grand Rapids it shows for preemergent timing GDD32, an accumulation of 785 so far, and a cutoff to further treatments at 800.
    For crabgrass germination, they use GDD base 50, and it shows an accumulation of 98, and germination beginning at 100 GDD. Late germination is at 600 to 1400 GDD(base 50).
     
  6. JFGauvreau

    JFGauvreau LawnSite Bronze Member
    Posts: 1,297

    If you have any more useful sites like that, let me know!
     
  7. mdlwn1

    mdlwn1 LawnSite Silver Member
    Posts: 2,443

    Microclimates..anyone who has been skiing or lives in the mountains knows that the weather forcast/records may only apply to a small section of the hill. You guys are goning to make me figure this phone pic thing out.
     
  8. ctSeb

    ctSeb LawnSite Member
    Posts: 12

    What does everyone recommend for a mowing height for kbg/rye? I'm at 3" now and am thinking about bumping it up to 3.5".
     
  9. OrganicsMaine

    OrganicsMaine LawnSite Senior Member
    Posts: 553

    3" now is good. Late June through Aug. 3.5", back to 3 in Sept. and then a final at 2.5
     
  10. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    I like to cut even at 2.5 in the Spring to open up the ground to warm sunshine then cut it higher as the season moves along...
     

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