VH301 (water soluble potassium fulvate flake/powder)
Humic acid: 55-60%, fulvic acid: 10-15%, K₂O: 12%, water solubility≥97%
Recommended Application: Foliar spray: 0.5-1ml per liter water at the interval of 10-15 days during the growing stage; drip irrigation: 6-8kg per hectare.