Grass Powerhouse Liquid Fertilizer (2-pack)
$54 $60
(2) 42.3 fl. oz. pouch, covers up to 10,000 sq. ft.
Buy 2, Save 10%





Lawn glow-up in one watering.
Fast-acting 24-0-3 liquid fertilizer that greens up your lawn, drives steady growth, and builds heat resilience. Zero pesticides. All grass types.
Wondering what your lawn really needs?
Let's create a custom plan for you.
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Buy 2, Save 10%





Your lawn's new favorite energy drink
Grass Powerhouse is a 24-0-3 liquid lawn fertilizer for fast, visible green-up. Nitrogen fuels thick growth, chelated iron dials up deep color, and seaweed extract with potassium keeps grass steady through summer heat. Attach the pouch to your hose and spray, no mixing needed. Results in 24 to 48 hours, way faster than granular.
What makes Grass Powerhouse Liquid Fertilizer (2-Pack) different
- 24-0-3 NPK with the highest nitrogen in its class
- Chelated iron for deep color, not just growth
- Seaweed extract and potassium for heat resilience
- Attach to hose and spray, no measuring needed
- Zero pesticides, works on all grass types
- Visible green-up in 24 to 48 hours
Ingredients
Nitrogen drives fast, dense grass growth and rapid green-up across your entire lawn.
Potassium strengthens water management and helps your lawn hold up through heat and drought.
Seaweed extract builds stress resilience so your grass stays steady when temperatures climb.
Iron delivers deep, rich greening without pushing excessive top growth.
How to use
For best results, apply early morning or evening between 50 and 85 degrees F. Make sure your lawn is well hydrated. Avoid use on drought-stressed or heat-stressed lawns.
- Connect the universal hose-end sprayer to your garden hose and attach the fertilizer pouch.
- Turn on the water and apply evenly across your lawn until the pouch is empty, about 10 to 15 minutes.
- Reapply every 4 to 6 weeks from spring through fall.
- Keep the sprayer for future applications.

Customer reviews
3.4
Based on 5 reviews
Popular topics
Murdered my lawn
I’ve really liked some of the other products, like Nix Tix, Dandelion Doom, and Weed and Green, but this product absolutely killed my grass
Sunday
Hi Li, thanks for sharing your experience with us. Do you mind reaching out to our team so we can see what's going on with your lawn situation? You can reach them at [email protected] or by calling 415-903-6932.
Was this review helpful?Grass powerhouse
I applied the Sunday Grass powerhouse to my lawn in late March (according to my custom plan). It was very easy to use, instructions are very clear and didn’t take very long to cover both the front and back yards. The results have been amazing. You could tell the difference in about 24 hours. There is a common area that adjoins our lawn and I did not apply it there. The difference is very noticeable in how green and health the lawn looks compared to the grass in the common area. Dry please with their products so far.
Was this review helpful?EXCELLENT
I've been throwing everything i can at my lawn all season. Nothing has been working. I dropped this on it, and BAM! My entire lawn looks better than my neighbor, who uses Green Thumb lawn. Service. I'm buying a ton of this next year. Very happy with the results Sunday has given me. Will continue to use. Can't wait for next year!
Was this review helpful?It's Intentional. I like it
It's easy to use. Clear on the intent and instructions. Keeps me aligned with the lawn that I am building but with a partner instead of my randomness.
Was this review helpful?Urea Nitrogen Based Synthetic Fertalizer - Not Good For the Planet and Pets
The results are so-so, but I fell for the better for the pets, kids and planet marketing scheme. In the end, this is just another synthetic based Urea Nitrogen fertilizer no different than any other - except being way more expensive. If you care about the planet, do not use Urea based on the amount of energy it takes to produce. If you care about your kids and pets, use only 100% organic fertilizer.
Sunday
We designed Sunday with safety in mind, so we are extremely selective about not only the ingredients we use but also the lawn and garden techniques we recommend. We are proud to say we do not use many of the chemicals that are commonly found in traditional lawn care products; all Sunday fertilizers are 100% pesticide-free. Take a look here for more information: https://www.getsunday.com/shed/sunday-way/sunday-on-chemicals
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Questions & answers
5 questions
Question: When can I water my lawn after spraying it on?
Jeff McConathy
We recommend waiting 24 hours after application before watering your lawn.
Question: Whatsvthe difference between green machine and grass powerhouse
Jeff McConathy
Thanks for reaching out! The difference in these pouches is their level of Nitrogen. Green Machine has a 22-0-3 NPK ratio, and Grass Powerhouse has a 24-0-3 NPK ratio.
Question: I just put seed down yesterday, and the fertilizer came today. Can I use the fertilizer on the seed or should I wait until it germinates?
Louisa D.
If overseeding, you can apply your nutrients at any time. If seeding bare soil, we recommend waiting for that seed to sprout before applying nutrients, since our nutrients are designed to feed actively growing grass.
Question: When should I use this product in relation to overseeding?
Louisa D.
You can apply our nutrients at any time after overseeding an existing lawn. However, when using on a newly seeded lawn, we recommend waiting for the seed to sprout before applying our nutrients.
Question: Does one pouch cover 5000 sq ft or the two pouches together?
Louisa D.
Great question! Each pouch covers 2,500 square feet, so two pouches together cover 5,000 square feet.

