fast acting fertilizer for plants N-Ext RGS
SKU: 5458724981
fast acting fertilizer for plants

fast acting fertilizer for plants N-Ext RGS

Sale price$24.59 Regular price$27.32
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

fast acting fertilizer for plants N-Ext RGSN Ext RGS RGS stands for Root Growth Stimulant, and thats exactly what it does. This bio stimulant is packed with hormones from sea kelp that stimulate roots and stolons rhizomes coupled with chelating humic acid. One gallon covers up to 42,600 sq ft Analysis is 0 0 1:: N P K Root Growth Stimulant (with humic acid and sea kelp) Great for soil health and root stimulation Available in multiple sizes* Product Description: RGS is a root growth stimulant

N-Ext RGS™ - RGS stands for Root Growth Stimulant, and that’s exactly what it does. This bio-stimulant is packed with hormones from sea kelp that stimulate roots and stolons/rhizomes coupled with chelating humic acid.

  • One gallon covers up to 42,600 sq ft
  • Analysis is 0-0-1::N-P-K
  • Root Growth Stimulant (with humic acid and sea kelp)
  • Great for soil health and root stimulation
  • Available in multiple sizes*

Product Description:

RGS is a root growth stimulant with sea kelp and humic acid is our primary bio-stimulant offering for use in lawns and landscapes. Formulated by John Perry of Greene County Fertilizer Co, RGS is the foundation of all Lawn Care Nut and Yard Mastery programs. 

If you are new to spraying liquids on your lawn, this is a great one to start with. It won't "burn" the lawn, or anything like that - and RGS is the best to start with anyway since it aids in soil health and stimulates roots in turf.

If you have challenges with your grass holding on during summer heat, getting RGS into the soil will help it through the stress. RGS is truly the backbone of the bio-stimulant program, hands down, and has the highest concentration of sea kelp hormones in the line. It was designed to increase rooting and decrease stress pressure caused by heat and drought. It will also feed microbial life in the soil which helps to optimize your fertilizer treatments.

"N-Ext" is the name of this line of products, and N-Ext stands for "Nitrogen Extension." RGS, Root Growth Stimulant, is kind of like the "base layer" of that line because it contains humic acid and sea kelp, the two primary bio-stimulants we recommend. The biologically active material contains humic acid and sea kelp to aid in initial spring green-up, buffer and extend nitrogen release rates, and add oxygen to the soil profile for greater nutrient uptake.

*Size options and coverage: 

  • 1 Single Quart (32 oz) = covers up to 10,650 sq ft
  • 1 Single Gallon (128 oz) = covers up to 42,600 sq ft
  • 2 Gallon Pack (256 oz) = covers up to 85,200 sq ft
  • 4 Gallon Pack (512 oz) = covers up to 170,400 sq ft 
  • 5 Gallon Pack (640 oz) = covers up to 213,000 sq ft  

You can SAVE MONEY with the “mix and match” in our Build-a-Box options

Check out our other Greene County products here!

Application Information:

You will need to water in RGS if you apply with a backpack/pump sprayer. If you are using a quart hose-end sprayer, here is a video with instructions. 

RGS can be applied at any time during the growing season on all grass types, including the following:

  • Cool-Season Lawns - Kentucky Bluegrass, Turf Type Tall Fescue (all fescues), Ryegrass.
  • Warm-Season Lawns - Bermuda, St Augustine, Zoysia, Centipede, Bahia.

Custom bio-stimulant timing and recommendations are available in our free Yard Mastery app. Click here to download.

 Coverage/Gallon

42,600 sq ft at the low rate (3 oz/1,000 sq ft)
21,300 sq ft at the high rate (6 oz/1,000 sq ft)

Application  Details

Mix 3 oz- 6 oz per gallon of water in a backpack/pump sprayer and spray that evenly across 1,000 sq ft of lawn. 

Apply every 30-45 days

Water-In  Instructions

Water into the soil within 24 hours with 1/4" of rainfall or irrigation.

Do not apply if your lawn is saturated. Rinse excess off sidewalks and driveways to avoid staining.

  • Label / Specs / SDS / Info: RGS Info,  Bio-Stimulant Guide
  • Package Includes: Quart, One, Two, Four Single Gallon(s), or 5-Gallon (two 2.5-gallon bottles) based on selection.
  • Storage: Store in a cool, dry place away from direct sunlight. The product can be stored for 2 years under warehouse conditions.

Shipping Information:

Shipping Costs

Included for most states within the U.S.

NO P.O. Boxes

State Restrictions

 

Alaska (AK), California (CA), Hawaii (HI), and Oregon (OR)
Stickers

 

Yes, a free sticker with this item

Typical Delivery Time

 

4 - 7 business days

Product Type

Liquid Concentrate

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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 5458724981

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Maradee Milich
Charlottesville, US
★★★★★ 5
Great magnesium supplement with natural ingredi...
Size: 90 Count (Pack of 3)
This is exactly what I needed for my daily health routine. I appreciate that it's made from marine magnesium and includes avocado oil for better absorption. The clinically tested aspect gives me confidence in its quality. The 3-pack is convenient and ensures I don't run out quickly. Overall, a perfect supplement that meets my expectations for natural sourcing and effectiveness.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 2, 2026
L
Verified Purchase
Lisa Thompson
Lexington, US
★★★★★ 5
Perfect for me!!
Size: 90 Count (Pack of 1)
This was always my most favorite Magnesium supplement until Smarter Nutrition replaced it with another formula. Marine Derived Magnesium helped me fall asleep and more importantly, by shutting off my thoughts so that if I did wake for any reason, I was able to drift back to sleep quickly!! Am so relieved that they've brought it back! 😴
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 1, 2025
J
Verified Purchase
jorge
Grantham, US
★★★★★ 4
Really liked the natural sourcing and added ben...
Size: 90 Count (Pack of 1)
This product is great. I appreciated the avocado oil included and that it's naturally sourced. It helps support sleep, bones, and muscles, which I need. The only thing is, I wish it absorbed faster. Still, overall, a good supplement for daily use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 24, 2025
T
Verified Purchase
TommyC
Carnegie, US
★★★★★ 5
Great supplement for overall health benefits
Size: 90 Count (Pack of 1)
I really like the features of the magnesium supplement. The fact that it's non-GMO and naturally sourced makes me feel better about taking it daily. I noticed improved sleep and muscle recovery after workouts. Including avocado oil and trace minerals is a nice touch. Overall, a good product for supporting bone, sleep, and muscle health.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 21, 2025
M
MH
Lake Worth, US
★★★★★ 3
Didn't help for sleep
Size: 90 Count (Pack of 1), Size: 90 Count (Pack of 1)
First of all, I want to mention that I do think this is a quality product. Sea-based magnesium has had a good effect on me before and with the combination of AstraGin and avocado oil, this is a solid list of ingredients. AstraGin is a patented proven combo of notoginseng and Astragalus that helps with absorption in small doses. This was my first time trying AstraGin and I was unsure about using it for nighttime use due to the notoginseng, which is stimulating. But I have seen this in some other sleep formulas and they claim it's only meant for absorption and shouldn't stimulate. The first time I tried it at night with some of my usual supplements, I fell asleep easily but all of a sudden woke up 2 hours later and couldn't go back to sleep for 1.5 hrs. I only drifted back to sleeping bc I was so awake and had to resort to THC gummies. I took a couple days off and tried it again and it was the same bad sleep. Your experience might be different from mine because I am very sensitive to a lot of supplements and I think the AstraGin just doesn't agree with my system but I wanted to let other sensitive people know so they can be cautious.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 22, 2025

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