The Double Duty of Copper: Nourishing Trees and Fighting Rust in Kona
The Double Duty of Copper: Nourishing Trees and Fighting Rust in Kona Copper as a Nutrient: Soil vs. Foliar Application Copper (Cu) is an essential micronutrient for coffee trees, supporting photosynthesis, lignin formation, and enzyme activity. In Kona’s volcanic soils, copper availability may be limited due to high iron and manganese levels, which compete for…

