a basic recipe for preparation of Hydropnics Nutrient Solutions for various stages of plant growth (Vegetative, Flowering & Fruiting). This is a general purpose recipe.To Make 100 Liters of Nutrient SolutionSaltWeight in GramsVegetative Nutrient (9.5 : 5.7 : 11.3)

Weight in GramsFlowering Nutrient (5.5 : 8 : 18.4)

Weight in GramsFruiting Nutrient (8.2 : 5.9 : 13.6)

Soln A/B

Calcium Nitrate Ca(No3)2158.73108.47211.64A

Potassium Nitrate KNO355.2974.0774.07A

Sulphate of Potash K2SO412.1712.1744.97B

Monopatassium Phosphate KH2PO436.7736.7736.77B

Magnesium Sulphate MgSO4 * 7H2O64.0263.4963.49B

Trace Mix10 ml10 ml10 mlB

Chelated Iron100 ml100 ml100 mlA

Trace Mix for 1 L Concentrated Solution Weight in Grams

Zinc Sulphate (ZnSO4)2.20

Manganese Sulphate (MnSO4)15.4

Copper Sulphate (CuSO4)0.8

Boric Acid (H3BO3)28.60

Sodium Molybdate (Na2MoO4)0.25

Iron Concentrate Solution for1 LWeight in Grams

Chelated Iron (FeEDTA)19.48

How to Prepare the solution.Iron Chelate Solution Take 1 Litre bottle and add the Chelated Iron to 500 ml of water and dissolve it. Once dissolved top up the bottle to 1 L capacityTrace Mix Solution Take 1 Litre bottle and fill it with 500 ml of water. Add each of the trace element salts individually and dissolve one by one. Ensure that you add the next salt only after the previous salt it completely dissolved. After all trace elements are dissolved top up the bottle with water to 1 L capacityTake two 5L cans and label them as Solution A and Solution B.Solution A1) Take a 5 L can and label it as Solution A2) Fill about 4 liters of water in the can3) Add Calcium Nitrate and dissolve it completely4) Add Potassium Nitrate dissolve it completely5) Add 100 ml of the Iron Chelate solution6) Top up the can with water to make it 5 L in capacitySolution B1) Take a 5 L can and label it as Solution B2) Fill about 4 liters of water in the can3) Add each of the salts and dissolve in the can one by one. Ensure that the next salt is added only after the previous salt is completely dissolved.4) Add 10 ml of the trace mix5) Top up the can with water to it 5 L in capacityNow you have two 5 L cans of Solution A and Solution B. This is good for making 100 L of the Nutrient Solution. In case you need to make 10 L of the solution fill the reservoir tank with 5 L of water and then add 500 ml of Solution A and mix it thoroughly. Next add 500 ml of Solution B and mix it thorughly. Now fill up the reservoir to the 10 L capacity.A note about Water Quality and pH.Water Quality It is very important that the quality of water is good. Softened bore water is a big no no for Hydroponics due to the addition of NaCl during the ion exchange process. Ideally you should be using RO water or Rain water. In case you have to use municipal water let it sit for a day to get rid of the chlorine but I doubt how good the water our municipalities supply. In a later post I will give more information on creating your own recipes based on PPM and taking water quality into consideration.pH It is important to maintain the correct pH. You would need a pH meter to check for pH. So far I never had a need to decrease the pH (acidify) of the solution when using RO water. You can use Cooking Soda for increasing the pH while vinegar or citric acid or diluted Sulphuric acid (battery acid) for decreasing the pH.Disclaimer/Credits: The NKP part of the receipe has been adopted mainly from Keith Roberto's wonderful book 'How to Hydroponics'. The Trace elements part is gathered / culled from the many good people at the hyrdo forum on GardenWeb and the sample recipe by Daniel Fernandez's Hydroponic Buddy Calculator. If this is in violation of any copyrights please feel free to report this post to the admin to have this post deleted.