To support healthy durian tree growth, farmers often use a simple but powerful mix of humic acid and potassium nitrate. This formula helps young trees develop strong roots and vibrant leaves. In practice, mixing 5 spoons of each with 20 liters of water provides nutrients that are quickly absorbed.

The solution is sprayed evenly around the canopy area of about 30 durian trees. Humic acid improves nutrient absorption and activates soil microbes, while potassium nitrate supplies fast-acting nitrogen and potassium for early development.

Using this method every few weeks creates a stronger, healthier durian tree that is more resistant to stress and disease.