To buy high-quality leonardite, you should prioritize products with a by weight , as this ensures a potent source of biostimulants for soil health. Leonardite is a naturally occurring, highly oxidized form of lignite coal, often found in the upper layers of open-pit mines. Key Selection Criteria
: If you are an organic grower, ensure the product is approved by bodies like OMRI . Where to Buy Leonardite
: Standard high-grade products typically contain 70% humic acid . Lower concentrations, such as 20% or 40%, are also available for specific "concealer" or maintenance applications. Physical Form :
When evaluating leonardite products, consider the following factors to ensure they meet your agricultural or gardening needs:
: Look for products that are low in ash and free from heavy metal contaminants.
