have done some research and i think it might be useful for others so there u go
This is all u need:
Primary Nutrients Are Very Important.
nitrogen (N) - Nitrogen is needed for protein synthesis, photosynthesis, and the production of amino acids and enzymes. Nitrogen deficiency is particularly harmful to marijuana plants during the growth phase because it’s this chemical element that helps your plants build size and structure.
phosphorus (P) - Phosphorus is important for bud production, strong roots, maintenance of healthy Ribonucleic acid (a.k.a RNA) and DNA, and for seed production. Phosphorus is useful for plants that have only a small space for their roots, which is the case in most indoor hydroponics grow ops and for plants like marijuana that grow rapidly during the first few weeks of life.
potassium (K) - Your cannabis uses potassium for processing carbohydrates and for building and maintaining strong roots, maintaining disease resistance, and for forming flowers. Potassium is especially important during the bloom phase. If you see older leaves yellowing or browning, if you see slow growth, fragile stems and stalks, or small buds, you could be seeing signs of potassium deficiency.
Secondary Nutrients Are Important, Too
Calcium (Ca) - deficiency is a common problem in cannabis gardens, especially during the bloom phase, because calcium is heavily invested in plants’ floral production. Calcium deficiency is seen when growing tips and root tips die off, or plants have unnaturally dark-green foliage, flowers that rot or fail to mature, and weak stems or stalks.
magnesium (Mg) - another secondary nutrient, because these elements interact to energize each other. Magnesium is also a crucial element in the bloom phase that’s often undersupplied by most brands of hydroponics nutrients.
If you provide one without the other, your plants may suffer. Magnesium is especially needed during the bloom phase, in order to balance the large amounts of potassium fed to your plants to boost flower size and potency. It contributes to photosynthesis and the creation of enzymes that activate and facilitate your plants’ metabolism. Symptoms of magnesium deficiency include leaves that curl upward along the edges, yellowing along the middle vein of leaves, and patterns of interveinal yellowing on older leaves.
Sulfur (S) - is necessary for terpenoid production and for proper ripening of buds. It’s also needed for production of several amino acids that fuel flower growth. If your plants are sulfur deficient, they’ll display slow and/or spindly growth, and an overall yellow or light-green color of younger leaves.
Micro Amounts, Macro Importance
Along with primary and secondary elements, your plants need eight other elements, which are classified as micronutrients. Even though your plants need small amounts of these elements, micronutrients are essential for vigorous growth and maximum yield. If any are missing to a significant degree, it decreases your crop potential.
iron (Fe) - Iron is used in hydroponics formulas that revive crops after they’ve been damaged by heat, drought, disease, pests and stress. Iron is a catalyst for most of your plants’ metabolic processes.
zinc (Zn) - is necessary for production of a crucial plant growth regulator. A shortage of zinc may result in die-off of terminal growing tips, as well as a reduction in the number of budding sites your plants put forth during the early bloom phase.
boron (B),molybdenum (Mo), manganese (Mn), copper (Cu), chlorine (Cl)— are important for metabolic processes and the overall health of your cannabis plants.
nickel (Ni) - is required in the smallest amounts and was only recently added to the list of essential plant elements.
I have printed that and laminated its 1 page 2 sides. Until u remember it its very useful . So now when u buy shit u can check it and get sure ur buying the best shit u need.
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