What's causing grass to head very low?

Discussion in 'Lawn Mowing' started by lawncuttinfoo, May 16, 2007.

  1. lawncuttinfoo

    lawncuttinfoo LawnSite Bronze Member
    Posts: 1,010

    I'm cutting northern grasses at 3" and there are seed heads lower than the cutting height. I've never seen this before, usually I see heading at like 7". Any ideas?
     
  2. topsites

    topsites LawnSite Fanatic
    Posts: 21,653

    No, it's that time of year, it goes to seed in full-blown fashion so you'll see this, it is normal but watch out, when this happens it is your first sign that you need to start delaying your cuts by 2-3 days each, or you'll start developing signs of heat stress on the turf, yellow and brown spots beyond that, so start slowing down.
     
  3. dkeisala

    dkeisala LawnSite Senior Member
    Posts: 911

    Could be poa, annual bluegrass
     
  4. bohiaa

    bohiaa LawnSite Fanatic
    Posts: 5,220

    I'm seeing this in Texas.......
     
  5. hughmcjr

    hughmcjr LawnSite Member
    from Oregon
    Posts: 183

    It could be weed grasses, but grass and weeds will acclimate to a cutting height as a defense mechanism for seed growth. How many of us have heard a customer say cut my grass lower to get the dandelions or clover, only to return and see the clover or dandelions flower and seed at lower heights.
     
  6. lawnworker

    lawnworker LawnSite Senior Member
    Posts: 900

    This is happening in VA. I think it is lower mosture combined with some cool weather. If it was hot we would be a burnin lawns up.
     
  7. prostriper

    prostriper LawnSite Senior Member
    Posts: 336

    At this time of year it can also be new immature growth coming up and going to seed.Like was mentioned delay the cut a couple days or slightly lower your cut to top them off. To help avoid this I make my first cuts of the season are cut at 2.5-2.75.
     
  8. dwost

    dwost LawnSite Bronze Member
    Posts: 1,666

    I've got this too in my KB lawn. I was cutting at 3 and have moved up to 3.5. Even at 3" I was unable to cut them down. I'm thinking of dropping it back to 2.5 on my next cut to get rid of them but I'm not sure if they will just regrow at a lower height?? Any ideas on this? I know it usually only lasts a couple weeks but It makes the grass look light green due to the white in the seed heads....I want my nice dark lush green back!!!!
     
  9. upidstay

    upidstay LawnSite Bronze Member
    from CT
    Posts: 1,368

    Probably Poa Annua. Pre emergant in the fall, check with your local ag extension service for proper timing for your area. Certainty will also take it out post emergant
     
  10. dwost

    dwost LawnSite Bronze Member
    Posts: 1,666

    Mine is definitely not Annua. I had that in the past and rid the areas of it with overseeding. Mine is 100% KB. I cut at 3" and its taken most of them off. Another week and It should be finished for the season.
     

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