Green Planet - Pro Cal

Size: 1 Litre


Pro Cal is an excellent supplemental source of Magnesium, Calcium, and Iron. It is an excellent Supplement for plants engaged in rapid growth.

 How Does It Work?

Calcium is an element that isn’t very mobile within the plant and needs a good flow of fluid throughout the plant to pull it to the areas to which it is needed most and more importantly the calcium needs to be in a form that the plant can easily transport. It is of no use if there is an ample supply of Calcium but the plant can’t absorb it it. Pro Cal has solved this issue so the calcium source is readily available and married with extra magnesium and fully chelated iron.

Why It Works?

Pro Cal Works because it contains the following:

Calcium Nitrate – Calcium is sourced from calcium nitrate, Its presence is needed to turn an enzyme on or off and allow it to catalyse a reaction. Most growers incorporate higher levels of Pro Cal (around 50-200ppm) during the first two weeks of bloom. This is when the plant takes up a higher concentration of calcium and magnesium to help facilitate the rapid division of cells, changing the plant from a vegetativeto a reproductive state. Also, during the main flower set four to six weeks into the flowering process, additional Pro Cal is required.Â

Magnesium Nitrate – Magnesium is derived from magnesium nitrate providing a readily available source of both elements. Magnesium is part of the chlorophyll in all plants. Magnesium is part of the chlorophyll in all plants. Magnesium also is the central core of the chlorophyll  molecule in green plant tissue and essential for photosynthesis. Thus, if magnesium is deficient, the shortage of chlorophyll results in poor and stunted plant growth.

Fe EDDHA – is a chelate use to keep iron available in a pH range below 7.5

 Fe EDTA – Fe EDTA or iron Ethylenediaminetetraacetic acid is also a chelate that is used to keep iron available in a pH range below 7.5

 Low Molecular Weight Humic Acid – Also known as fulvic acid, helps keep Clcium fully chelated

 Key Points :-

  • Thickens cell walls;
  • Helps form calcium pectate;
  • Fully chelated iron;
  • Important source of magnesium;
  • Noticeable size increase;
  • Improved enzyme function;
  • Coco coir approved;
  • Powerful formulation;
  • Cost effective;


5mls per gallon throughout the vegetative stage and moving up to 7mls per gallon for the flowering stage stopping prior to the flush week.

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