Sunday Lawn & Garden Care

Lawn Aid Heat Stress Prevention Treatment

$25

42.3 fl. oz. pouch + hose-end sprayer, covers up to 3,000 sq. ft.

Sunday Lawn Aid heat stress treatment 42 oz pouch with hose-end sprayer for lawn heat stress preventionWoman Spraying Lawn aidWater conservationDrought tolerant lawn reviewLawn Aid Heat Stress Prevention Treatment back of pouch image

Liquid lawn treatment enriched with seaweed extract for summer heat

Specialized potassium and seaweed formula to reduce heat stress in lawns.

$25

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Summer is coming, and your roots need backup

Lawn Aid Heat Stress Prevention Treatment is a 0-0-3 fertilizer built to keep your lawn green when summer gets brutal. Zero nitrogen means no risk of burning stressed grass. Potassium and seaweed grow deeper roots and thicker turf so your yard handles the heat. Works on all grass types, and pairs with your custom lawn plan.

What makes Lawn Aid Heat Stress Prevention Treatment different
  • 0-0-3 NPK with zero nitrogen, no burn risk
  • Seaweed and potassium grow deeper roots
  • Hooks to your hose, done in 15 minutes
  • Pairs with your custom lawn plan
  • Works on cool and warm season grasses
  • Formulated without pesticides
Ingredients

Potassium: Balances water movement so grass blades hold up under heat. This is your lawn's first line of defense against wilting, brown patches, and summer stress.

Seaweed extract: Promotes deeper root growth and thicker turf density. Deeper roots reach more water and nutrients below the surface, keeping grass greener even when it's dry and hot up top.

How to use

For best results, apply early morning or late evening to a well-hydrated lawn.

  1. Connect the custom-engineered sprayer to your hose and attach the pouch. The sprayer mixes the right water-to-nutrient ratio for you.
  2. Walk your lawn in a steady sweeping motion until the pouch is empty. This typically takes 10 to 15 minutes.
  3. Water your lawn thoroughly after application. Once the lawn dries, you're good to get back on the grass.
  4. Reapply every 4 weeks from spring through fall, up to 8 times per year.

If using other Sunday products, let liquid fertilizers dry completely before applying anything else to the lawn. Drying time is typically 4 to 24 hours depending on your climate.

When should I apply Lawn Aid Heat Stress Prevention Treatment?

Lawn Aid Heat Stress Prevention Treatment works best when applied before peak summer heat, typically in April, May, or June. Your lawn needs time to absorb the potassium and seaweed before extreme temperatures hit.

Apply early morning or late evening to a well-hydrated lawn for the best results.

Can I use Lawn Aid with other Sunday lawn products?

Yes. Lawn Aid Heat Stress Prevention Treatment pairs well with your custom lawn plan and other Sunday products. Just let liquid fertilizers dry completely before applying anything else. Drying time is typically 4 to 24 hours depending on your climate.

How often can I reapply Lawn Aid during summer?

You can apply one pouch of Lawn Aid Heat Stress Prevention Treatment to actively growing grass every 4 to 6 weeks. Do not exceed 8 applications per growing season. Apply from spring through fall for ongoing root support and heat resilience.

Is it too late to apply Lawn Aid if my lawn is already brown?

Lawn Aid Heat Stress Prevention Treatment works best as a preventative, applied before heat stress sets in. If your lawn already has brown patches, Lawn Aid can still support root recovery.

For the strongest results, apply before your lawn shows signs of wilting.

Why does Lawn Aid have zero nitrogen?

Lawn Aid Heat Stress Prevention Treatment uses a 0-0-3 NPK formula because high-nitrogen fertilizers can burn grass under heat stress. The potassium and seaweed strengthen cell walls and grow deeper roots instead.

No nitrogen means no burn risk for stressed grass.

How long after applying Lawn Aid can I water my lawn?

Water your lawn thoroughly right after applying Lawn Aid Heat Stress Prevention Treatment. Post-application watering helps the potassium and seaweed absorb into the soil and reach the root zone. Once the lawn dries, you can get back on the grass.

When is it safe for people and pets to go on my lawn after applying?

Our ingredients break down quickly and don’t persist in the environment. After our products dry, you can get back to using your lawn!

What is the difference between Lawn Aid and Drought Defense?

Lawn Aid uses potassium and seaweed to help grass tolerate heat. Drought Defense is a surfactant that helps soil hold water.

They tackle different problems. Lawn Aid supports the grass during high temperatures. Drought Defense helps the soil stretch every drop of water.

Customer reviews

4.2

starstarstarstarstar

Based on 50 reviews

Customers say

AI-generated from customer reviews.

Lawn Aid Heat Stress Prevention Treatment effectively prevents heat stress on lawns during hot summers, providing relief and maintaining lawn health.

Reviews with media

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50 reviews

  • Alfredo

    Verified Buyer

    LocationSchertz, Texas

    starstarstarstarstar

    Hot Sommer

    we had a very hot summer. so hot that we had a record number of 100 degree or more this summer. put a lot of work on the lawn to see it burn and dry up. very happy with results

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  • Terry

    Verified Buyer

    LocationAustin, TX

    starstarstarstarstar

    90 Days over 100

    Here in Austin, Texas we had 90 days over a 100. I used this to help my lawn survive. Using this I was able to use less water.

    Was this review helpful?
  • Kevin

    Verified Buyer

    LocationSalt Lake City Utah

    starstarstarstarstar

    Left Waxy Layer

    I believe this left a waxy coating on my lawn that turned it hydrophobic.

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  • Suzanne

    Verified Buyer

    LocationLubbock, TX

    starstarstarstarstar

    Very pleased!

    This treatment did wonders for making the lawn thicker. We have bermuda grass and 5 dogs, so I'm very happy with the results. Next year I won't wait as long to order.

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  • Jaime

    Verified Buyer

    LocationDallas Texas

    starstarstarstarstar

    Worked perfectly in Texas. Almost

    Worked perfectly in Texas. Almost instantly i could see the yellow turn shades of green. I first watered the lawn and applied and very happy with results. All Sunday products are great.

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  • Melinda

    Verified Buyer

    LocationColumbus, Ohio

    starstarstarstarstar

    Lawn Aid Heat Stress Application

    I really didn’t see a difference when using the Lawn Aid Heat Stress application. It seemed like my grass looked worse after using the product. The treatment did not work for my lawn as I expected.

    Sunday

    We're sorry to hear that your results weren't as expected! Have you connected with your Yard Advisor yet? They're here to help you make the most of your products. You can reach them at [email protected] or by calling 415-903-6932.

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  • William

    Verified Buyer

    LocationHouston, TX

    starstarstarstarstar

    Sunday

    Grass handled the hardest heat summer here in Texas with no issue. Great Product!

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  • Alexander

    Verified Buyer

    LocationSt. Petersburg, FL

    starstarstarstarstar

    Hot Florida Summers

    Product seemed to work well. I live in Florida and we had an unseasonably dry summer this year, but my lawn still thrived with minimal supplemental watering. Wil definitely use again next year.

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  • Michael

    Verified Buyer

    LocationMaryland

    starstarstarstarstar

    Rough Summer

    This really helped my lawn to bounce back after a rough Summer. As well as hold it's own and not get any worse. I have hope now that it will flourish this Fall.

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  • Michael

    Verified Buyer

    LocationColumbus, Ohio

    starstarstarstarstar

    Helps keep the lawn strong during the heat

    During the hottest months the treatment seemed to keep my lawn looking good.

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$25