what is the difference between (a) “andersons charx” with humic acid/biochar and … (b) “andersons humichar” also with same humic acid/biochar ?

Nothing one is e-commerce/consumer sku humichar the the other one is the Pro sku

how many square feet does this bag cover?

10,000 to 40,000 sq ft. from High to Low rate.

What is the percentage of carbon and humic acid?

You're kidding right? In the product description it says: About this item HumiChar is an organic, carbon-based soil amendment containing 50% high-quality humic acid and 50% granulated biochar -- Provides the benefit of quickly-available humic acid and the long-term soil building qualities of the biochar that lasts for decades

What is the shelf life for this product? I have a smaller lawn so might use this for 2-3 years. Will it stay good?

Doc's says it will last, unused, for years. I also have a small lawn, only 3200 sqft. I break it down into two applications about 6 to 8 weeks apart. Don't forget the recommended application of chicken feed.

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The Andersons HumiChar Organic Soil Amendment with Humic Acid and Biochar Covers 12,000 sq ft (12 lb)

Product ID: 347519289

Details

Brand
The Andersons
Item Weight
12 Pounds
Style
Modern
UPC
031865325212
Unit Count
192.0 Ounce

⚡DG Technology for fast, efficient nutrient release

🌱30% Humic Acid for rapid nutrient uptake

🔥43% Granulated Biochar for long-term soil vitality

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€ 148.35

Duties & taxes included

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌿 Elevate your garden game with science-backed soil magic!

ECO CHIC GARDENING - OMRI listed and organic—grow green while staying clean.
BOOST YOUR SOILS IQ - Patented DG Technology ensures nutrients break down faster and feed your plants smarter.
DUAL ACTION POWERHOUSE - Combines quick-acting humic acid with biochar’s decades-long soil enhancement.
EFFORTLESS APPLICATION - Low-dust, uniform granules make spreading a breeze—blend with any fertilizer program or use solo.
MAX COVERAGE MINIMAL FUSS - One 12 lb bag treats up to 12,000 sq ft—perfect for your expansive lawn or garden oasis.

The Andersons HumiChar is a premium organic soil amendment featuring 30% humic acid and 43% granulated biochar, enhanced by patented DG Technology for rapid nutrient delivery. Covering up to 12,000 sq ft per 12 lb bag, it improves soil, lawn, and plant health while reducing fertilizer dependency. OMRI listed and environmentally friendly, it’s designed for easy application and long-term soil vitality.

Specifications

ASIN	B08ZBGQNJ7
Best Sellers Rank	#4,771 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #64 in Garden Soil
Brand Name	The Andersons
Customer Reviews	4.7 4.7 out of 5 stars (4,124)
Item Weight	12 Pounds
Manufacturer	The Andersons
Manufacturer Part Number	1
Model Number	12
Style Name	Modern
UPC	031865325212
Unit Count	192.0 Ounce
Volume	12 Liters

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