Pre-emergent

Discussion in 'Pesticide & Herbicide Application' started by grassbegone, Jun 29, 2008.

  1. grassbegone

    grassbegone LawnSite Member
    Posts: 8

    I have always sprayed undesired weeds and grass after it has come up. I would like your input concerning pre-emergent herbicides. Is it safe to use in any kind of landscaping with young trees, bushes, and flowers. From what I understand, pre-emergents go after the seed and anything that already is above ground is "safe" from it. Is this true? How close can it be applied to bushes, trees, etc.? Does it have to be watered in? What time of year is it applied? Any input you can send my direction would be appreciated!! By the way, we're in Wyoming where it doesn't rain!!!!
     
  2. ArizPestWeed

    ArizPestWeed LawnSite Bronze Member
    Posts: 1,457

    All your answers are on the label , ALL
     
  3. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,345

    Correct. Pre-emergent blocks the emergence of seeds. So established plants are OK--although--sometimes young roots may be damaged if shallow in soil. Usually applied in spring for crabgrass and annuals--but anytime is OK. Yes it usually has to be watered-in, or at least mixed with the top inch of soil.
     

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