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Lawn Fungus Control

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  • Provides a broad spectrum, systemic control of soil-borne diseases
  • Prevents brown patch, leaf spot, red thread, dollar spot and more
  • Works on all lawn grass types
  • Safe to apply year-round, in spring, summer and fall
Real Lawn Fungus Control Lawns
Product Overview
Jonathan Green Lawn Fungus Control is a broad spectrum granular fungicide that combats turf diseases. Use this product as a preventative measure in areas where fungus has been a problem in the past to stop it from recurring. In preventative instances, the lighter rate will be enough. Once the disease occurs, however, a heavier curative rate is likely to be needed.

Please bear in mind that Jonathan Green Lawn Fungus Control can only prevent or stop the disease from spreading—it will not repair the damage which has already happened. In such cases, re-seeding will be necessary to replace the damaged grass and thicken the lawn.
Coverage Guide


Coverage Amount
7.5 lb.
Up to 5,000 sq. ft.
22.5 lb.
Up to 15,000 sq. ft.
How Do I Calculate My Lawn Size? First measure the length and width of your lawn. Then multiply the length by the width and deduct the square footage of any non-lawn areas (landscape bed, patio, deck, pool, etc.) from the total. Now you know how much product you need to purchase!
Shipping & Returns


  • Free ground shipping now available on orders of $75 or more! For smaller orders, shipping costs are calculated at checkout.
  • We ship orders the same day if placed by 2PM EST (later orders will be shipped the next day).
  • Orders are not shipped or delivered on weekends or holidays.
  • We offer ground and expedited shipping.


  • We offer 30-day free returns for replacement or full refund for items that are damaged or defective (shipping included). If damaged by the carrier, please file a claim with them.
  • If your items have been used or aren’t in the original packaging, we will give you a refund (minus the cost of shipping) based on the condition of the product.

View our complete shipping and return policy. If you have questions about your order, please contact our customer service team at [email protected].

Don’t Forget These Essentials

  • Red thread, large brown patch, leaf spot, leaf, crown, and root Disease, dollar spot, Ascochyta leaf blight, copper spot, fusarium patch, Zoysia patch, pink snow mold, Anthracnose (foliar and basal), Bermudagrass decline, take-all patch, necrotic ring spot, spring dead spot, coprinus snow mold, fusarium blight, gray leaf spot (blast), stripe smut, and summer patch

  • Thiophanate-methyl

  • Lawn Fungus Control can be safely applied to any cool or warm-season lawn in spring, summer, or fall.

  • This product can be applied to both cool and warm-season lawns.

  • If fungus returns in the lawn year-after-year, use Jonathan Green Love Your Soil® with Lawn Fungus Control once or twice a year to improve the health of the soil and help prevent disease. Make the first application before the air temperature reaches 75°F.

  • Yes

  • Irrigate the lawn lightly with ½ inch of water or light rainfall immediately after application to activate the product.

  • We recommend waiting at least 24 hours for people and pets to enter the treated area after application to allow the product to activate. Keep people and pets out of the area during application.

    • Can cause moderate eye irritation. Avoid contact with eyes or clothing.
    • Carefully read all instructions prior to application.
    • Wear proper personal protective equipment (PPE) when applying this product, such as gloves, a long-sleeved shirt, long pants, and shoes with socks.
    • Do not apply near water, storm drains, or drainage ditches.
    • Do not apply if heavy rain is expected.
    • Apply this product only to your lawn or garden and sweep any product that lands on the driveway, sidewalk or street back onto your lawn or garden.
    • After application, wash hands thoroughly with soap and water after handling and before eating or drinking
    • Do not apply directly to water or areas where surface water is present or to intertidal areas below the mean high water mark. Runoff from treated areas may be hazardous to aquatic organisms in neighboring areas. Do not contaminate water when disposing of equipment washwater or rinsate.
  • Always read and follow the product label before use.




    Safety Data Sheets can be found at www.jonathangreen.com/safety-data-sheets-sds. If you have a specific question, do not hesitate to contact us.


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Step 1/4

Who makes your spreader?

Jonathan GreenScottsCycloneEarthway / AmesEchoGandyGreenViewLescoPrecision / Red DevilPrizeLAWNRepublic / EZSearsSpykerSta-GreenViconVigoro

Don’t see your spreader here? Contact the manufacturer or review your spreader’s manual.


Step 2/4

What type of spreader are you using?

Rotary Drop


Step 3/4

What is the model of your spreader?

Cyclone Rotary EV-N-SPRED® Broadcast Earthway Rotary Ames Broadcast Earthway Drop Ames Drop Echo RB 60 Gandy Drop Jet Spred III Drop Spred Standard Deluxe and Pro Green-Meter Lesco (Lettered) Lesco (Numbered) Precision Rotary Red Devil Rotary Precision Drop Red Devil Drop Prizelawn CBR III Prizelawn CBR IV EZ Broadcast EZ Drop All Rotary Turf Builder Classic AccuGreen 2000-3000 AccuGreen 1000 Scotts PF4 Sears Broadcast Sears Drop P70-12010 Spyker Rotary Rotary Vicon Rotary

Don’t see your spreader model here? Contact the manufacturer or review your spreader’s manual.


Step 4/4

Select the rate that best suits your lawn needs.

Depending on the type of product you selected there may only be one application rate.

Regular Rate - 1.5 lb per 1000 sq ftSevere Disease Rate - 3 lb per 1000 sq ft

Note: “New lawn” indicates that you are starting a lawn from bare dirt vs overseeding or applying product to an existing lawn.


Lawn Fungus Control

Your Spreader Setting is:

Start over
  • Can I treat lawn fungus and insects at the same time?

    Yes, however, it is important to remember to carefully follow all product recommendations and package directions prior to application.


    If you want to prevent lawn fungus and grub/insect infestations, we suggest applying Jonathan Green Lawn Fungus Control first, then applying Grub & Insect Control second, and water it in immediately.


    If you are applying Organic Insect Control, apply the Lawn Fungus Control first and water it in, then apply the Organic Insect Control after the lawn is dry.

  • Apply Lawn Fungus Control and Love Your Soil for warm weather fungus.

    Lawn Fungus Control is a systemic fungicide for both preventative and curative treatments. Fungus is seen most often at temperatures of 80°F when humidity levels are very high. It spreads through mycelia, which “jump” from spot to spot. Mycelia uses water and moisture to move throughout the lawn. Therefore, water in the morning and NOT at night to ensure that water doesn’t stay on the leaves for too long. Mycelia look like spider webs on the lawn, which appear before damage occurs. If you see these “webs” then apply Lawn Fungus Control. Applying Love Your Soil on the same day will increase water penetration into the soil. This will limit the “swimming” of mycelia and allow your fungicide treatment to be more effective.

  • Can I apply Lawn Fungus Control with other products?



    Lawn Fungus Control can be applied at the same time that you apply any turf products, including grass seed mixtures. Each application of Jonathan Green’s Lawn Fungus Control will provide effective turf disease control for up to twenty-one days. It works systemically from inside the grass plant to control leaf spot, dollar spot, striped smut, fusarium blight, patch and mold diseases in addition to more than twenty one other turf diseases.

  • Dog vomit fungus and other mushrooms

    Dog vomit fungus (and mushrooms in general) is indicative of something rotting in the subsoil; perhaps a tree stump or a dead animal. Fully remove the mushrooms and discard them. To manage mushrooms, aeration is necessary to break up the existing dense fungal mat of mycelia.


    How to remove mushrooms: 

    • Determine the depth of the fungal mat with a trowel or shovel.
    • Remove mushroom cores at least ¼ to 1 inch in diameter slightly deeper than the fungal mat.
    • You may have to aerate these areas a number of times each year to break up the fungal mat and improves water and air penetration into the soil
    • To completely eradicate mushrooms, you may need to remove the soil to a depth of 12 to 18 inches.
    • Refill the trench with fresh soil and reseed the area.
    • Be careful not to infest any surrounding areas with the contaminated soil!
    • Apply Love Your Soil to help the grass to grow and thrive; this hastens the breakdown of organic matter.


    Note: New sod lawn installations require frequent irrigation and sometimes promote the growth of mushrooms. The mushrooms do not harm the lawn and will disappear when irrigation is reduced.

Features You’ll Love

Our Lawn Fungus Control helps prevent more than 20 unsightly lawn diseases, stops fungus from spreading, and can be applied safely any time of year.

Prevent Over 20 Lawn Diseases

Get ahead of a lawn fungus problem in your yard! Provide your lawn with widespread control and prevention from various diseases, including brown patch, dollar spot, and red thread.
Prevent Over 20 Lawn Diseases

Safe to Apply Year-Round

While other fungicides risk burning your lawn in high temperatures, Lawn Fungus Control can be safely applied to any cool or warm-season lawn in spring, summer, or fall.
Safe to Apply Year-Round

How to Apply


  • For best results, apply the fungus control before the disease occurs.
  • Use a drop or broadcast spreader to uniformly apply. Do not apply by hand or with a hand-held spreader.
  • Check to make sure the spreader opening at the bottom of the hopper is closed.
  • Set the spreader according to the recommended setting on the packaging or use our Spreader Settings Tool above.
  • Push the lever forward only when ready to spread.
  • Apply around the perimeter of the lawn to establish a turning area. Then run the spreader back and forth within the area outlined by your first perimeter application. Always allow an overlap to avoid gaps in coverage.
  • To protect the environment, do not allow the product to enter or runoff into storm drains, drainage ditches, gutters or surface waters. See the product label for further information.


  • Sweep any excess granules off of hard surfaces onto the lawn.
  • Irrigate the lawn lightly with ½ inch of water or rainfall immediately after application to activate the product.
  • Dead patches in the lawn will need to be raked out and reseeded.

If fungus returns in the lawn year-after-year, use Jonathan Green Love Your Soil® with Lawn Fungus Control once or twice a year to improve the health of the soil and help prevent disease. Make the first application before the air temperature reaches 75°F.

Lawn Fungus Control 5,000 sq. ft.
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