Fall Fortify Plus Liquid Lawn Fertilizer

Name: Fall Fortify Plus Liquid Lawn Fertilizer
Brand: Sunday
SKU: SBA3021
Price: 30.00 USD
Availability: InStock

$30

42.3 fl. oz., Covers up to 5,000 sq. ft.

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Premium Pouch

Fall Fortify Plus liquid lawn fertilizer pouch

Fall Fortify Plus liquid fertilizer ingredients image

Premium fall lawn fertilizer

Late-season lawn fertilizer for greening, deep rooting and resilience to winter injury.

Free shipping! Ships in 1-2 business days

Wondering what your lawn really needs?

Let's create a custom plan for you.

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Fortify your lawn for Fall

Fall Fortify Plus Micronutrients is a winterizing fertilizer formulated to strengthen and maintain lawns from fall into spring.

Our new and improved fall formulation delivers quicker greening, promotes deeper root growth, and helps lawns withstand winter damage. With a precise blend of nitrogen, iron, and manganese, it provides exactly what your lawn needs in the fall for a greener, healthier spring.

A Sunday premium selection

Premium fertilizers, enriched with concentrated nutrients and unique soil enhancers, outperform standard options to deliver superior, long-lasting lawn health.

Product Features:

22-0-0 NPK (nitrogen-phosphorus-potassium) fall lawn fertilizer
Extended greening and deeper rooting
Helps resist winter injury and damage
Made without pesticides
Easy hose-on application
Covers up to 5,000 sq. ft.
Includes fertilizer and custom-engineered hose-end sprayer

Ingredients:

Nitrogen: For deep rooting, recovery and resilience

Iron: For extended deeper greening

Manganese and micronutrients: For healthy grass growth

Instructions:

Apply in Fall (Aug-Oct) during the morning or evening to a well-hydrated lawn.

Connect the sprayer to the hose and pouch.
Turn on water and apply evenly across your lawn until the entire lawn is covered. A full pouch application takes about 10 minutes.
Let lawn dry fully so nutrients can be absorbed fully. Once the lawn dries, you can get back out on your grass.
Reapply every 4 weeks until mid-October.

Helpful Tips from Lawn Advisors:

Why does my lawn need fertilizer in fall?

Fertilizing your lawn in the fall extends its green appearance into early winter and strengthens its resistance to injury and disease during the dormant months. It also promotes deeper root growth, leading to a healthier lawn in the spring.

How are Sunday premium liquid fertilizers different?

Sunday's premium liquid fertilizers, originally part of custom lawn care plans, are highly concentrated with nutrients, soil amendments, and specialized ingredients for quick and effective results.

How much lawn fertilizer will I need?

Each fertilizer pouch covers 5,000 sq. ft. per treatment. The number of pouches you'll need depends on your lawn size and the specific application requirements.

How to apply alongside other Sunday products

Sunday fertilizers are designed to complement each other! For liquid fertilizers, wait at least one week between applications. For granular fertilizers, allow 4-6 weeks between treatments. For other lawn care products, apply them after the fertilizer has dried on the lawn.

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!

Are there any US states where this is not approved for use?

This product is approved for use in all states.

Sunday liquid lawn fertilizer pouches side by side on a lawn

Liquid Lawn Fertilizer Instructions

Get a greener lawn with Sunday's nutrient-rich liquid lawn fertilizers. Follow our easy instructions and application tips for optimal growth and greening across your lawn.

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Customer reviews

0 Reviews, 6 Q&As

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REVIEWS
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Updating Results

07/11/25

Mindy

10/17/24

Q: I just planted new sod. How soon can/should I begin using Fall Fortify? Or is there another fertilizer you recommend for new sod? thanks.

10/18/24

A: You sure can use Sunday on the new sod in your lawn! Since sod is well-fertilized when you lay it from the manufacturer, we recommend waiting a few weeks after installation (until roots are established and you can't lift it off the soil) before applying our nutrients. This will help avoid over-fertilization. You can find more information about caring for your new sod lawn here: https://www.getsunday.com/shed/lawn/caring-for-your-new-sod-lawn

Shawn

10/14/24

Q: Can I use this after aeration and overseeding

10/14/24

A: If you plan on aerating your lawn, we recommend aerating first, waiting about 1 week, then resuming your nutrient applications.

Sunday nutrients may be applied directly before or after seeding or patching your lawn.

For best results, seed first and wait for about 60% of the grass to sprout—usually around three weeks—before applying nutrients. This ensures new seedlings can absorb them effectively.

For more on these topics, check out our blog on the website-- The Shed! https://www.getsunday.com/shed/lawn/do-you-need-to-aerate-your-lawn

Cira

09/23/24

Q: How long after overseeding and filling in a couple puppy patches with Sunday Pet Lawn Seed would you recommend waiting before applying Fall Fortify product (if at all)?

Wondering if I apply this season or hold it until next. Thanks in advance.

09/24/24

A: Great question! We recommend waiting for those patches to begin sprouting before applying any nutrients.

Cami

09/20/24

Q: I started growing grass seed about three weeks ago and I'm getting ready to mow for the first time. . Can I apply this before or after my first mowing? Will it help the new grass make it through the winter?

09/20/24

A: We recommend applying after you mow! If you choose to apply before mowing, we recommend waiting 24 hours after applying before you mow.

Meg

09/15/24

Q: Does this product need a universal sprayer to apply? Or is this pouch and a hose all you need?

09/16/24

A: This product includes a hose-end sprayer that you can use with your garden hose to apply the pouch!

Jon

06/24/24

Q: It says to “water your lawn thoroughly post-application”, does that mean immediately after applying the fertilizer, before it dries? Or does that mean after you’ve fully followed the instructions, including after allowing the grass to dry?