Seaweed Supplement

Name: Seaweed Supplement
Brand: Andersons Lawn
SKU: 10011394
Price: 69.88 USD
Availability: InStock

Liquid Lawn Supplement

Covers up to: 21,300 sq. ft.

21,300 sq. ft.

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Made in the USA

Overview

Highly concentrated formula with 50% the highest quality of kelp (Ascophyllum Nodosum) and 2% fulvic acids for a more resilient lawn
Delivers up to 2.5X more seaweed extract per application than competitor formula
Designed to be applied ahead of increasing air temperatures to support lawns through summer stress and drought
Improves root growth, seed germination and increases soil microbial activity
Can be used alongside your fertilizer program during the growing season
Safe for all grass types

Documents

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The Benefits of Seaweed + Fulvic Acid

Seaweed Extract Builds Resilience

Seaweed extract, particularly from Ascophyllum nodosum, works by supporting the natural systems within your lawn. Instead of forcing top growth, it helps strengthen the plant from the ground up. One of the most noticeable benefits is improved root development. A lawn with deeper, more robust roots can access moisture and nutrients more effectively, which becomes critical during heat and drought.

The Role of Fulvic Acid

Fulvic acid complements seaweed extract by improving how your lawn uses nutrients. Because it is readily absorbed through both leaves and roots, it moves quickly within the plant, helping deliver nutrients where they’re needed most. During summer stress, when nutrient uptake naturally slows, this becomes especially important.

When to Apply Seaweed Supplement

This product is designed to be applied ahead of increasing air temperatures to help support lawns through summer stress and is intended to be used as a supplement to your existing lawn care routine. Multiple applications enhance performance of this product. Shake well before using. Avoid watering-in Seaweed Supplement. It is best to let it sit on the grass after application. Seaweed Supplement does not replace watering– water is essential for maintaining your lawn, and your lawn should receive 1-2 inches of water per week.

Applying Using a Spray Tank

Mix 6 ounces of product with one gallon of water and apply at the rate of one gallon of mix per 1,000 sq. ft.

Applying Using a Hose-End Sprayer

Use a yellow (60:1) hose-end sprayer
Fill with 32 oz. of Seaweed Supplement
Attach to hose while the sprayer is in the "off" position. Turn the water on.
Once you are in the area you intend to apply product, turn the spray head attachment to "on." Spray evenly while walking at a steady pace (about 3 mph) moving the nozzle side to side to cover an area of approximately 6 ft. wide.
Coverage may vary based on walking speed and water pressure
One 32 oz bottle should treat 5,000-6,000 sq. ft.

Pro Tips for Best Results

Mix & Apply on Calm Days

Apply when winds are low (less drift), so coverage is even and uptake is efficient.

Spray Evenly

Maintain steady pressure and overlap slightly to ensure uniform coverage across all turf areas.

Avoid Overspray

Keep spray away from sidewalks, buildings, and fences.

Rinse Sprayer After Use

Always clean out your equipment after application to avoid residue or buildup that could affect future treatments.

Keep It Safe

Store in a cool, dry place.

Frequently Asked Questions

One of the biggest advantages of a seaweed and fulvic acid supplement is its ability to prepare your lawn ahead of time. Applying it before temperatures rise, typically in the late-spring and early-summer, allows your turf to build resilience proactively. It can also be applied when your lawn is stressed during the summer heat and drought.

Pets are safe to enter back out onto the lawn after the lawn has completely dried after applying Seaweed Supplement.

Yes, you can! If applying the same day, ensure the granular fertilizer you are using is recommended to be watered-in after application. Apply your granular fertilizer first, water it in, and then spray Seaweed Supplement.

No, it is not recommended to water-in Seaweed Supplement. It is best to let it sit on the grass after application.

Reviews

Overall rating: 5.0 / 5 from 7 reviews.

AI Generated Review Summary

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Review highlights

Reviews

"Man this paired with other andersons foliars helped transform my backyard. Here are before and after pics which are 2 weeks apart."

— Michael (5/5)

I hated my garden for

"I hated my garden for a moment this summer. Lots of rain. Sprayed garden with Bonide Infuse. That helped but the garden keep looking blah. Growth had stalled. Blooms had stalled. Enter an email with this seaweed spray. Ran it by ChatGPT and it told me it was not only good for lawns, but for gardens too. Not only that but was one of the top products in its category. The Andersons had it on sale so I gave it a shot. Applied around 7:30 pm. But the NEXT night, I could tell something was happening. I remained hesitant bc the garden had been so disappointing all summer. Nope…the next day and until now, the garden has sprung to life!! Colors! New blooms! New growth! I have over 250 curated plants, trees and shrubs. ALL look like they are full of life again! Do not miss this product! And there’s SO much of it! I have to use 9 gallons to cover all my ornamentals. So with a 3 gallon sprayer I use 6 oz per full tank. I have a ton left! I want to spray it every 2 weeks now! And I’m going to! Thanks for the top notch amazing product. I will be a repeat buyer 100%"

— Brandon N. (5/5)

My lawn went from brown

"My lawn went from brown and stressed in areas to lush and green. It took 2 applications to see the results."

— Andrew C. (5/5)

Have not applied yet

"Have not applied yet"

— Charles K. (5/5)

Great product.

"Great product."

— J. T. (5/5)

first time using along other

"first time using along other micronutrients. Greened up nicely."

— Andrew J. (5/5)

Worked as advertised

"Worked as advertised"

— Randy E. (5/5)

Q&A

Other Customer Favorites

Liquid Lawn Supplement

Seaweed Supplement

$69.88

Professional Tips and Tricks

Prepare Your Lawn Through Summer Stress: The Benefits of Seaweed + Fulvic Acid

Learn how adding seaweed and fulvic acid to your regimen will help your lawn withstand summer heat, drought, and stress.

Drought Do's and Don'ts

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What to Do for Your Lawn During Summer Heat & Drought

Learn how to water, mow, and protect your grass in the summer heat to keep it healthy and resilient.

Should I Fertilize My Lawn in the Summer?

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Why Does My Lawn Have Dry Patches? Understanding Localized Dry Spots and Hot Spots

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