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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🌿 Elevate your soil game—because your garden deserves the best!

PATENTED DG TECHNOLOGY - Ensures quick, efficient nutrient breakdown for faster plant uptake and healthier growth.
USER FRIENDLY APPLICATION - Low dust, uniform granules blend seamlessly with fertilizers or work solo for hassle-free use.
ECO FRIENDLY OMRI LISTED - Certified organic and environmentally responsible—grow green with confidence.
DUAL ACTION SOIL POWERHOUSE - Combines fast-acting humic acid with long-lasting biochar for immediate and sustained soil vitality.
COVERS 12 000 SQ FT WITH EASE - Generous 12 lb bag treats large areas, perfect for expansive lawns and gardens.

The Andersons HumiChar Organic Soil Amendment is a premium 12 lb blend of 50% humic acid and 50% granulated biochar, designed to enhance soil, lawn, and plant health across 12,000 sq ft. Featuring patented Dispersible Granule (DG) Technology, it delivers nutrients rapidly and efficiently while being OMRI listed for organic gardening. Easy to apply and environmentally friendly, it reduces fertilizer dependency and builds soil vitality for decades.

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