One of the important projects of the founders of the plantation was the building of the irrigation system which brings East Maui mountain runoff water to the arid central valley of Maui. The reservoir storage capacity is 1.065 billion gallons. Efficient drip irrigation systems supply water to all of the cultivated area of the plantation. The drip systems use thin-wall polyethylene tubing to apply water. Each tube serves two adjacent rows of sugarcane.
Fertilizer is applied through the irrigation system.
From 290 to 340 pounds of nitrogen are applied per acre during the first year of the crop. Phosphorous and potassium are applied as determined by soil and plant analysis. In addition, calcium carbonate and calcium silicate may be applied by the broadest method at planting time, depending on soil analysis. Most diseases are controlled through the development of resistant varieties. Weeds are probably the biggest economic pests to sugar cane culture.