Bush Doctor Cal-Mag

Bush Doctor Cal-Mag by FoxFarm is an OMRI Listed organic liquid calcium and magnesium supplement providing 3% calcium and 0.9% magnesium per application, with a 1-0-0 NPK ratio. It's designed to address two of the most commonly overlooked secondary nutrient deficiencies in cannabis cultivation.

Calcium is essential for new cell production, structural integrity, and preventing tip burn and blossom end rot. Magnesium is the central atom of the chlorophyll molecule, making it critical for photosynthesis and overall plant energy. Deficiencies in either element show up quickly and can stall growth or reduce yield even when the primary NPK program is correct.

Bush Doctor Cal-Mag strengthens cell walls, supports fruit development, and addresses deficiencies before they cause visible damage. Use it throughout the grow cycle, particularly with coco coir (which binds calcium), soft or RO water, or when running LEDs at high intensity, all of which increase Ca/Mg demand. Being OMRI Listed and certified CDFA Organic Input Material, it fits cleanly into organic grow programs without compromising certification.