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  North Country MGV

gARDEN bLOGS

Labor Day Lawn Care

8/29/2022

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If you do only one thing this Labor Day weekend, fertilize your lawn! 

Fall is an important time of year for lawns.  It is the ideal time for reseeding and fertilizing.  There are a number of excellent University of Wisconsin Extension Bulletins and Fact Sheets that will give you all the information you need to know to help your lawn flourish.   ​
Mowing:  According to David Bayer from UWEX Outagamie County the most important cultural practice associated with turf care is proper mowing.  Mow high (3 inches) during the spring and summer months when grass reaches 4 inches.  Continue mowing in the fall until the grass stops growing.  Mow shorter in the last few mowings.  For the last mowing set the mower 1 inch shorter to prevent snow mold in spring and to discourage moles, voles, and mice from burrowing in your lawn all winter. 
Fertilizer:  A fertilizer program is recommended based on your personal preference.  A minimum maintenance program is to apply a winterizer fertilizer (26-0-12) in early September.  If you prefer a more lush lawn, fertilizer can be applied two times; add an early June application to the September application.  For our area a maximum application of three times is recommended; for a high maintenance lawn apply fertilizer in early June, July, and early September.  The July fertilizer application can be skipped if a mulching mower is used.  These are the active grass growing periods in Wisconsin.  Never apply fertilizer during dormant periods.
Seeding:  The best time to establish a new lawn or reseed is between August 15 and September 20; mid-May is also a good time.  It pays to buy quality seed; it will contain less weed seed and better grass varieties.   According to the University Extension, “the only way to evaluate the quality of a mix is to read and understand the label. “  Extension recommends paying attention to these points when checking out labels:
  • Avoid mixes that contain annual ryegrass (Lolium multiforum) because it dies after a year and may prevent desirable grass species from becoming established.
  • Do not purchase seed with any noxious weed seed or if the seed is labeld as “VNS” or “Variety Not Stated” as you cannot be sure what species of grass you are purchasing.
  • Purchase and use certified seed within 12 months of the date tested.
  • For sunny area the grass blend should come close to 65% Kentucky Blue Grass, 20% Fine Fescue, and 15% Perennial Rye Grass.
  • For Shady areas look for a blend close to a mix of 40% Kentucky Blue Grass, 50% Fine Fescue, and 15% Perennial Rye Grass.
Why a mix?  Each grass has positive and negative characteristics that may be important for success in your lawn.   According to UW Extension the best low-maintenance grass species for lawns included a mix of tall fescue, fine fescues (Chewings, hard, or red) and common—not improved—varieties of Kentucky Blue Grass. 
 
Kentucky Blue Grass is one of the most popular grasses in Wisconsin.  It is winter hardy, grows by rhizomes, is soft to touch, and mows well.  However it goes into summer dormancy, does not tolerate heat well, is shade intolerant, and has high fertilizer needs.   Most sod is Kentucky Blue Grass. 
Perennial Rye Grass is quick to germinate, but is not very winter hardy and is intolerant of summer stress of heat or drought.   It is usually put into seed mixtures because it is quick to germinate and helps with early erosion control. 
Fine Fescues ( Hard, Red, or Chewings) have low fertilizer needs, are slow growing (less mowing), can be grown in shade or sun, and have some drought tolerance.   However they are susceptible to disease in high traffic areas, and can get summer patch and snow mold.  It is good to have a mix of Fine Fescues to help offset the negatives. 
The type of seed will determine the number of fertilizer applications needed and how much you want to mow.  For example, a mix with a high percentage of Kentucky Blue Grass may not do well if you plan to fertilize once per year.    Each seed type has its advantages and disadvantages.  There are none that are perfect for every situation.  

UW Extension Bulletins
These bulletins and more can be viewed and downloaded as a PDF file or purchased from the
https://learningstore.uwex.edu/

  • Do-It-Yourself Alternative Lawn Care (A3964)
  • Calibrating and Using Lawn Fertilizer and Lime Spreaders (A2306)
  • Lawn Establishment and Renovation (A3434)
  • Lawn Fertilization (A2303)
  • Lawn Maintenance (A3435)
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