Hydro A is a professional-grade base nutrient formulated for hydroponic cannabis cultivation. This part of the two-part system provides essential calcium and trace minerals that support cell structure, root development, and nutrient transport. Designed for recirculating or run-to-waste systems, Hydro A ensures your plants grow fast and stay strong. When used with Hydro B, it creates a balanced, high-performance nutrient profile for all stages of the grow. It’s clean, precise, and built for serious hydro growers who want to get the most from every drop. For a complete feeding that covers all your plants nutritional needs, utilize in combination with Plagron’s Hydro B fertilizer.