Servicing the Mpls/St. Paul metro through 5 area offices:    Eden Prairie (952) 941-2900 | Burnsville (952) 890-6655
Woodbury (651) 735-4422 | Plymouth (763) 383-7655
New Brighton (651) 633-9892



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Joan from New Brighton says:

05/02/11 06:10 PM

I have used Guaranteed since the early 90's and I have enjoyed watching there company grow without compromising the service they have provided to us! we love supporting our local companies


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Refer a Neighbor... or a Friend

Receive one free Fertilizer and Weed control application on your next service when you refer a neighbor or a friend to Guaranteed Turf Care and they sign up for our Nature Green or Weekender Mowing program.

Although the quantities of secondary nutrients and micronutrients in MN soil required for turf growth are quite small, they are all necessary to maintain good quality turf. Fortunately, the quantity of these mineral nutrients in most Minnesota soils is usually adequate. 

Sulfur is a secondary element most common to be deficient in Minnesota turfgrasses, especially in sandy soils or soils void of organic matter. Sulfur-deficient turfgrass symptoms include yellowing older leaves, slowed growth, and delayed maturity. Sulfur is commonly supplied to turf during the breakdown of soil organic matter. When sulfur is thought to be deficient, apply 4 ounces of sulfur (99% sulfur) to 1,000 square feet as a test area to evaluate results. Should deficiency symptoms be eliminated, apply 4 ounces of sulfur per 1,000 square feet over the remaining turf area. Sulfur can also be supplied to turf as gypsum (18.6% sulfur), ferrous sulfate (18.8% sulfur), potassium sulfate (17.6% sulfur), and ammonium sulfate (24% sulfur).

Micronutrients are required in very small quantities and are often supplied as impurities in commonly used fertilizers and in lawn clippings, liming materials, topdressing, certain pesticides, and irrigation water. Sandiness increases the possibility for micronutrient deficiencies; however, only a few select suburbs in the twin cities have sandy soils. 

Iron is the micronutrient involved in the production of chlorophyll and is most often found to be deficient in Minnesota turf. Iron deficiency is characterized by an interveinal chlorosis or yellowing of turfgrass leaves and an eventual thinning of the turf.  Leaf yellowing first appears on the younger upper leaves in interveinal tissues. Deficiencies of iron are a more serious problem under conditions of high pH (above 7.5) and high soil phosphorus. The problem can be corrected by applying ironite at a rate of 10 lbs. Per 1000 feet squared. Deficiencies of other micronutrients are not common in turf, but high pH is also known to induce deficiencies of manganese, zinc, or copper. At Guaranteed Turf Care (GTC) we have a custom blended granular that contains Iron, Manganese, Sulfur, Magnesium, Zinc, Boron, and Copper giving a complete coverage of Secondary and Micronutrients.   

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