Reach the full genetic potential of your crops with Emerald Harvest Cali Pro Grow A & B and Cali Pro Bloom A & B, our complete 2-part base nutrient series. Cali Pro is a nitrogen-rich fertilizer that nourishes your high-yield, indoor-grown crops with the essential elements they need to develop strong stalks and stems and support a robust harvest. Cali Pro is rich in phosphorus, potassium and other essential plant nutrients needed for vigorous fruiting and flowering. It also contains trace elements such as chelated iron, cobalt, manganese and zinc. Use Cali Pro Grow A & B during the vegetative stage. Emerald Harvest Cali Pro Grow A helps out plants in their vegetative stage with an NPK of 3-0-0.