Humic acid powder can be applied dry, but it is more commonly mixed with water in a watering can, sprayer, or irrigation system. Although the application rate is very low, it is optimal, so applying more is not better.
Humic Acid Application
When Humic acid is used in water, thoroughly pre-mix the desired amount of powder with water in a separate container to dissolve the powder before adding it to the main liquid tank. Work slowly, and preferably outdoors – it’s messy.
Soil – Mix the dry powder with water at 90 grams of powder (6 Tbsp or a generous 1/3 cup) per liter of water to make a liquid humic acid solution. For direct soil applications, apply 45-90 ml (3-6 Tbsp) of this solution per 1000 sq ft by mixing with enough water to cover the area, about a 3 liter for 90 ml. For the best results, apply at planting or before germination and irrigate after. Applications must be done every 6-8 weeks during the growing season.
Foliar – Mix 2 grams of the dry powder with 1 liter of water to make liquid humic acid solution and spray on plant foliage until the leaves are fully wet. At this dilution, one liter covers some 2000 sq ft. Don’t use more – this stuff goes a long way.
Compost Tea – Add 15 gram (1 Tbsp) of dry humic acid powder into your 5 liter brewer at the start of the brew. No more.
We sell imported Humic acid to manufacturers and large-scale consumers in and around India. If you wish to try our products please feel free to contact us.