Lawn Aid Heat Stress Prevention Treatment
$25
42.3 fl. oz. pouch + hose-end sprayer, covers up to 3,000 sq. ft.





Liquid lawn treatment enriched with seaweed extract for summer heat
Specialized potassium and seaweed formula to reduce heat stress in lawns.
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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.
- Connect the custom-engineered sprayer to your hose and attach the pouch. The sprayer mixes the right water-to-nutrient ratio for you.
- Walk your lawn in a steady sweeping motion until the pouch is empty. This typically takes 10 to 15 minutes.
- Water your lawn thoroughly after application. Once the lawn dries, you're good to get back on the grass.
- 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.
Customer reviews
4.2
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
Popular topics
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
Was this review helpful?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?Left Waxy Layer
I believe this left a waxy coating on my lawn that turned it hydrophobic.
Was this review helpful?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.
Was this review helpful?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.
Was this review helpful?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.
Was this review helpful?Sunday
Grass handled the hardest heat summer here in Texas with no issue. Great Product!
Was this review helpful?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.
Was this review helpful?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.
Was this review helpful?Helps keep the lawn strong during the heat
During the hottest months the treatment seemed to keep my lawn looking good.
Was this review helpful?
Questions & answers
5 questions
Question: Going to use this to restore lawn to green grass. Can I use pre or post grab grass control after this is dry?
Jeff McConathy
Yes, we recommend waiting at least 24 hours between applications!
Question: How do I apply a coupon? I have received coupons in my shipments and I need to know how to apply them for more products. Thank you :)
Louisa D.
You can apply a coupon code in the Coupon Code area when you check out. Look for the 'Enter Code' text next to the green 'Apply' button.
Question: Is this OK for any type of grass?
Louisa D.
Yes! Our Sunday approach focuses on building soil health and boosting grass growth. Because of this, our nutrients work with just about every grass type out there!
Question: What is the difference between Lawn Aid and Drought Defense? I struggle with my grass drying out on a hill in my front yard that is western facing and gets a lot of direct sunlight in the summer.
Louisa D.
Lawn Aid is designed to be applied ahead of peak summer heat to establish a more resilient lawn. Drought Defense is designed for arid climates or during periods of low rainfall, to maintain a healthy, green lawn.
Question: What can I use for weeds in my lawn
Louisa D.
Dandelion Doom is our preferred weed control for use within lawns!

