pH Perfect® Connoisseur® Coco Grow A + B was an ultra-premium two-part base nutrient system specifically designed for coco coir growers, delivering optimal ratios of chelated iron, calcium, and magnesium to prevent nutrient lockout and ensure availability.This product has been discontinued and is no longer available for sale. Growers working in coco coir can explore our updated nutrient solutions designed to maintain calcium, magnesium, and iron availability throughout the vegetative phase.