Cronk Micro 5-0-1 Base Fertilizer with Calcium & Iron

Micro 5-0-1 is the foundational nutrient in the Cronk Classic 3-Part system, delivering essential calcium, iron, and trace minerals that enable plants to utilize nitrogen, phosphorus, and potassium from other fertilizers. Without adequate micronutrients, plants cannot access macronutrients regardless of availability.

Micronutrient deficiencies cause stunted growth, yellowing leaves, and poor yields even when NPK levels appear sufficient. Micro prevents these issues by supplying chelated iron, calcium, manganese, zinc, copper, boron, and molybdenum in plant-available forms that remain stable across pH ranges 4.0-6.5.

Key Benefits

• Provides complete micronutrient spectrum for enzyme activation and chlorophyll production

• Chelated iron (EDTA) prevents precipitation and stays available in hydroponic reservoirs

• Calcium strengthens cell walls and supports nutrient transport throughout the plant

• Works from seedling through harvest in the same 3-part system

Ideal For

Growers using the Classic 3-Part system in soil, coco coir, or hydroponic setups who want professional-grade nutrition with precise ratio control at every growth stage.

Read the Complete Micro Guide →