[N-Ext] Humic12 - 12% Humic Acid Bio-Stimulant (1 Gallon)

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This product is 1 Gallon of Humic12 (12% Humic Acid) bio-stimulant for lawns and landscapes. Over the years we have been asked to carry single gallons of the Greene County N-Ext products for when folks who use the popular bio-stimulant pack run out of one product they can refill only that product. In this case, Humic12.

Also customers with smaller lawns have wanted to ability to purchase a single gallon and we have worked hard to be able to make this available. All single gallon N-Ext products ship directly from our own warehouse.

If you would like to purchase 4 or 5 gallons you will save a bit of money due to shipping. There are higher price breaks with FedEx and UPS when shipping heavier items in a single box. We want to be up front about that.

4 gallon build a box here.

5 gallon Humic12 bio-stimulant here.

Single gallons do come with 1 free sticker included! 

We break the pricing down for you even more lower down in the description - in the meantime, here is what Humic12 bio-stimulant is all about:

Humic12 - 12% Humic Acid Bio-Stimulant

Humic12 by Greene Country Fertilizer Co is 12% humic acid. Humic acid one of the primary bio-stimulants used to improve overall soil health. The 12% concentration in this product is much higher than most currently available to DIYers. Plus, we send you a cool sticker with every order.

N-Ext Humic12, Now available in single gallons (new for 2021) and 4 and 5 gallon packs, or as a part of a custom box you put together yourself.

What is Humic12™

The benefits of N-Ext Humic12™ in your program are: Increased root growth, Increased chlorophyll content, Increased nutrient uptake, Improved soil structure, Improved water retention, Improved plant quality.

General Information:

N-Ext Humic12™ may be applied to all turf and planting beds at any time of the growing season. This product is readily dispersed in most fertilizer or micronutrient products. Avoid using this product with acids and oxidizers. This product is a weak alkaline solution and may alter the pH of certain solutions. A weak acid may be used to reduce the pH of the spray solution. This product may be applied with various irrigation water systems.

If you have “bad soil” then you want this high concentration of Humic Acid to really jumpstart the soil life and start pulling natural nutrients from that “bad soil”.

The benefits of Humic12 are:

  • Increased root growth
  • Increased chlorophyll content
  • Increased nutrient uptake
  • Improved soil structure
  • Improved plant quality

Download the [N-Ext] Humic12 PDF Product Label Here


You can apply Humic12 as often as every 4 weeks if you like. Be sure to water it in after you apply so it gets into the soil. 

The recommended application rate is 6 oz per 1,000 sq ft.

1 gallon = 128 oz

2.5 gallons = 320 oz

5 gallons = 640 oz

At the app rate of 6 oz/1,000 sq ft, you will get:

  • 21,300 sq ft of coverage from a single gallon
  • 53,300 sq ft of coverage from a 2.5-gallon jug
  • 106,600 sq ft of coverage from the full 5 gallons 


Pricing Comparison

5 Gallons of Humic12 costs $108 - $21.60/gallon (includes shipping)

4 gallons of Humic12 costs $99 - $24.75/gallon (includes shipping)

1 gallon of Humic12 (this listing) costs $32.99 (includes shipping)

This is due to shipping rates. Carriers charge less "per pound" for heavier weights in a single box compared to lesser weights in a single box. To put it simply, shipping is on average cheaper for 4 gallons than for a single gallon by weight.

So if you want the best value, get Greene County products via the 4 or 5 gallon "Build-a-Box" feature.

If you only need one gallon, you are still getting MASSIVE VALUE!

Better Value Than Competitors

There are other suppliers offering humic products charging $45-$55 for a single gallon of their formulation. Our price includes shipping right to your door and is hand packed by our staff and comes with a sticker too (we know you love the sticker!)

We wanted to point this out because we always strive to deliver maximum transparency and value for our customers. #DIYfirst

Storage: Store in a cool dry place away from direct sunlight. Product will store for 2 years under warehouse conditions.

IMPORTANT SHIPPING INFORMATION: Shipping is included in the price. 

We can not currently ship to Alaska, Hawaii, Oregon and/or PO Boxes

Typically delivered in 4-7 business days.

Free sticker with every order.

When you purchase you'll also receive my N-Ext product guide on when and how much to put down (via email).