How long before I must apply crabgrass control in NE

Discussion in 'Pesticide & Herbicide Application' started by Hrock, Apr 5, 2008.

  1. Hrock

    Hrock LawnSite Member
    Messages: 32

    on one new account I want to start with a good starter juicing and was wondering how long can it go before I have to get the crabgrass control down (northeast)
    Thanks in advance.
  2. humble1

    humble1 LawnSite Silver Member
    from MA
    Messages: 2,519

    cough i have seen a few big chemical companies that sound like cotts but with another letter in the front. anyway they put down pre emergent before easter, snow still everywhere
  3. no_longer_lurker

    no_longer_lurker LawnSite Member
    Messages: 36

    we're down the road, around the corner and up the highway a bit from you.

    general rule of thumb you'll want that preemergent on the turf by 1st week in May. Depending on the product you are using.
    Our shut off date for Rnd 1 is May 10
  4. Uranus

    Uranus LawnSite Bronze Member
    from Mass
    Messages: 1,624

    Before the forsythia bloom. If the blooms drop, YOUR LATE
  5. gsxr1100

    gsxr1100 LawnSite Member
    from mobile
    Messages: 138

    my Pre-m or dim will be going down tomorrow in MA
  6. heritage

    heritage LawnSite Bronze Member
    Messages: 1,358

    This season before May 1st in North/Central New Jersey.

  7. lawns Etc

    lawns Etc LawnSite Silver Member
    Messages: 2,277

    Well I have a few large Crabgrasses in my own yard that started yesterday in S Jersey all of my customers are already done but mine got a shot of Dimension today so you better get it down soon in zone 6
  8. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,808

    On the Scotts Turfbuilder plus Halts bag it says "Apply between the second and fifth mowing."

    Or...apply before the soil temp hits 55. Measure with metal cooking thermometer at one inch deep in the shade, under turfgrass. Rule of thumb--before the air temp hits 80 degrees. Start over if there is a frost. If soil is dry-- germination will be delayed.

    If you prefer to use Growing Degree Days base 50--I suggest (personal opinion) between 450 and 900 GDD.

    The above all will have different results, of course. Thin sandy soil and soil on the south side of buildings will warm up first of course.

    Zone 5, must complete applications by May 10th.
  9. Whitey4

    Whitey4 LawnSite Silver Member
    Messages: 2,448

    While plant phenological timing mechanisms are fairly reliable, at least as CG pre-M's are concerned relating to forsythia bloom, I disagree if this is how you time your app. Before forsythia bloom is too early. Full bloom to 75% full bloom drop isn't too late.

    Soil temps and GDD's are better timing mechanisms, but depending on how fast you can complete you round 1, if it's done before complete bloom drop occurs, it should be fine. The Achilles heel with using forsythia bloom is that three warm days in a row can get soil temps over 55 fast.... and then, I would say it could be too late for complete CB control.
  10. Hrock

    Hrock LawnSite Member
    Messages: 32

    Thank you very much guys, I juiced it with starter and I will be getting the crabgrass control down in the next few weeks I am going to hit it with tupersan now though.

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