[N-Ext] Humic12 - 12% Humic Acid Bio-Stimulant
[N-Ext] Humic12 - 12% Humic Acid Bio-Stimulant
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[N-Ext] Humic12 - 12% Humic Acid Bio-Stimulant

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This is a 5-Gallon Jug

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 cool stickers 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 

For a 5,000 sq ft lawn, this means you will get ~21 total applications: 

6 oz/1,000 sq ft x 5 = 30 oz

640 oz/30 oz = 21.3 total applications 

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 stickers 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).