What You Will Need:

1)      Two empty 1 Litre bottles
2)      Two empty 5 Litre buckets/cans

1)      10 L of hard/rain water
2)      Calcium Nitrate (Ca(No3)2): 200g for fruit, 160g for vegetables, 110g for flowers
3)      Potassium Nitrate (KNO3): 75g for fruit, 55g for vegetables, 75g for flowers
4)      Sulphate of Potash (K2SO4): 45g for fruit, 12g or vegetables, 12g for flowers
5)      Monopotassium Phosphate (KH2PO4): 37g for all
6)      Magnesium Sulphate (MgSO4 * 7H2O): 64g or all
7)      Chelated Iron (FeEDTA): 20g for all
8)      TRACE MIX INGEDIENTS: You will be mixing some items together to create a trace mix. For fruit, vegetables and flowers, you will need these items in these amounts:
Zinc Sulphate (ZnSO4): 2.2g
Manganese Sulphate (MnSO4): 15g
Copper Sulphate (CuSO4): 0.8g
Boric Acid (H3BO3): 28g
Sodium Molybdate (Na2MoO4): 0.25g
Putting It Together:

1)      The first step is to make your trace mix solution. Take the 1L bottle and fill it half way with the hard water. Add the TRACE MIX INGEDIENTS from item #8 above one by one, letting them dissolve before adding the next one. Once finished, fill the bottle up to 1L. This will now be referred to as our TRACE MIX SOLUTION. It can be saved and used multiple times afterwards.
2)      Next, we need to make an IRON CHELATE SOLUTION. Fill the second 1L bottle half way with hard water. Add the 20g of Chelated Iron from item #7. Fill the bottle up to 1L. This too can be used multiple times afterwards.
3)      Take a 5L container, and fill it up with 4L of hard water. Add the Calcium Nitrate (item #2) and let it dissolve completely. Add the Potassium Nitrate (item #3) and let it dissolve completely. Add 100ml of the Iron Chelate solution. Fill the bucket up to 5L with water. This will be MIX 1.
4)      Take your second 5L container and fill it up with 4L of hard water. Individually add the Sulphate of Potash (#4) Monopotassium Phosphate (KH2PO4) (#5) and Magnesium Sulphate (MgSO4 * 7H2O) individually, allowing each to dissolve fully before adding the next. Add 10ml of Trace Mix Solution. Fill the bucket up to 5L with water. This will be MIX 2.
The reason we make two solutions (Mix 1 and Mix 2) is to avoid certain chemicals from reacting with each other over time. The two mixes, as well as your trace mix and iron chelate solutions, can be saved for multiple uses. You now have enough ingredients to supply 100L of nutrient solution for your plants.
To use your nutrient solution, you want to create a mix of 90% water, 5% Mix 1, 5% Mix 2.
So to create 1L of nutrient solution, use 900ml of hard water, 50ml of Mix 1 and 50ml of Mix 2.
To create 10L, mix 9L of hard water, 500ml of Mix 1, and 500ml of Mix 2.

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