Although Calcium (Ca), Magnesium and Sulfur are considered secondary elements, their importance to successful crop production is equally important as N, P and K.
Calcium is needed for plant growth, participating in cell wall formation and cell division. It is used by the plants to maintain healthy roots, ensures the proper translocation of nutrients and carbohydrates within the plant, and activates a number of plant growth-regulating enzyme systems.
In substrates (soil or soilless mixes) it replaces hydrogen ions on soil surface — helping to reduce reserve acidity.
Magnesium is directly tied to the energy status in plants. It is an essential constituent of the chlorophyll molecule. It also essential for phosphate availability and metabolism as well as cell division and protein formation. It is also linked to plant respiration and the activation of several enzymes systems.
Your hydroponic or horticultural container crop nutrient system is only as good as its weakest link. The weak link in fertility programs is often overlooked — sulfur (S).
Plants often require as much sulfur as phosphorus. Sulfur is included within the Tropical Storm vegetative growth system because it plays a wide variety of vital roles vegetative stages of plant development.
Sulfur is a molecular building block in a number of amino acids, metabolites, proteins, hormones and vitamins and serves as a catalyst in chlorophyll production. Synthesis of two key amino acids directly linked to relief of stress in plants require sulfur.
It plays a central role in the conversion of nitrate to amino acids. Simply stated, without sufficient supplies of sulfur, plants cannot efficiently use nitrogen and other nutrients. This is particularly important during the vegetative stage of plant development where nitrogen and photosynthesis fuel the vegetative stage.
Don’t let sulfur be the missing link in your nutrient system.