Magnesium is an essential secondary element for hydroponic crops, participating in chlorophyll synthesis and various enzymatic reactions. In soilless culture nutrient solutions, ordinary inorganic magnesium fertilizers easily react with phosphate and carbonate to form precipitates, causing nutrient failure and pipeline blockage. EDTA chelated magnesium is the standard solution to this problem.

Ordinary magnesium sulfate has poor stability in hydroponic nutrient solutions. When the pH of the nutrient solution exceeds 6.5, magnesium ions begin to react with phosphate to form precipitates. Not only can they not be absorbed by crops, but they also adhere to root surfaces affecting nutrient absorption and block drip irrigation and NFT pipelines. EDTA chelated magnesium exists in a stable chelated state, and will not dissociate or precipitate in a wide pH range of 4.0-9.0, always maintaining an active state that can be directly absorbed by roots.

EDTA chelated magnesium has excellent water solubility, fast dissolution speed and no residue, adapting to various hydroponic modes such as NFT, DFT and substrate cultivation. The conventional application concentration is 30-50mg magnesium per liter of nutrient solution. Leafy vegetables can take the lower limit, while solanaceous fruits and fruit tree seedlings can take the medium to high limit. In daily management, it is necessary to regularly monitor the pH of the nutrient solution. If the pH exceeds 8.0, it should be adjusted down in time to ensure the stability of the chelate structure.

In addition, EDTA magnesium can stably coexist with other nutrients in the nutrient solution with little antagonism. It can continuously ensure crop chlorophyll synthesis, avoid interveinal yellowing of old leaves, and maintain normal crop photosynthetic rate and growth rhythm. It is the core secondary nutrient component in hydroponic formulas.