Spraying broadleaf weeds after the first freeze

Discussion in 'Pesticide & Herbicide Application' started by Harvestman, Oct 11, 2006.

  1. Harvestman

    Harvestman LawnSite Member
    Posts: 233

    Opinions Please! And if you do spray what do you use?
  2. ant

    ant LawnSite Silver Member
    Posts: 2,447

    cool power from riverdale
  3. Russ

    Russ LawnSite Senior Member
    Posts: 539

    Most effective time of the season to spray. Trimec Classic
  4. Grandview

    Grandview LawnSite Gold Member
    from WI
    Posts: 3,251

    Dandelions, thistles, ground ivy all seem to take up herbicide better after a frost. I use Lesco Three-Way. I have also used Triplett. I think the frost gets rid of any waxy cuticle on the leaves. Thus herbicides penetrate better. I will spray until about Nov 10th. As long as daytime temps are above 35 and the ground is the frozen I will spray.
  5. green_mark

    green_mark LawnSite Senior Member
    Posts: 494

    Green Guardian 14-0-5

    I love to get this between the first heavy frost and total ground freeze.
  6. greenscapes inc.

    greenscapes inc. LawnSite Member
    from Utah
    Posts: 137

    I was always under the impression that the temp needed to be in the upper 60's (at least) to get a good kill. Am I wrong?
  7. GrazerZ

    GrazerZ LawnSite Senior Member
    Posts: 670

    We spray every year after the first and more frosts. I have alot of guys tell me its a bad idea or look at me funny. But in the spring when they have weeds and my lawns are clean they become belivers.
  8. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    The first frost really has no bearing on the perennial weeds 9which the majority of them are). The herbicide will still work, as the plant is still uptaking.
  9. PR Fect

    PR Fect LawnSite Bronze Member
    Posts: 1,075

    Did our last spray for the season yesterday and we have had two soft frosts already this year. The best time to spray for broadleafs IMO. We do try to get everything sprayed before it gets cover in leafs. Three-way.
  10. teeca

    teeca LawnSite Bronze Member
    Posts: 1,202

    broadleaf weeds will continue to grow after the first frost as gunner stated. i use cool power an ester based formula and it kicks a$$, i have also used triplet and it too works great when the weather gets cooler (and not worked good in the summer), the fact being that the plants are opening up and taking in as much as possible to store food for the winter.

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