Nutrients that cannabis needs can be divided into three categories: Primary macro-nutrients, secondary macro-nutrients and micro-nutrients. This division is based on how much of each nutrient the plant needs.
Nitrogen, for example, is categorised as a primary nutrient because the plant needs more of it than calcium or sulphur, for example. Cannabis has different nutrient requirements in different phases. Nitrogen, for example, is mainly needed in the growth phase, but much less in the flowering phase.
On the other hand, the need for other nutrients, such as phosphorus, increases. In the growth and flowering fertilisers from well-known manufacturers, the nutrients are already optimally adapted in each case. (You can find more about the correct fertilising depending on the phase of life further down in the text).
You can find a more comprehensive and filterable overview in the pH & Ec Finder here...
| Phase | PPM (Hannah) | EC (mS/cm2) | PPM (Hannah) | EC (mS/cm2) |
| Early Growth | 350 - 400 ppm | 0,7 - 0,8 | 400 - 500 ppm | 0,8 - 1 |
| Seedling | 400 - 500 ppm | 1 - 1,2 | 500 - 600 ppm | 1 - 1,3 |
| Transition | 550 - 650 ppm | 1,3 - 1,5 | 600 - 750 ppm | 1,2 - 1,5 |
| Vegetative Stage 1 | 650 - 750 ppm | 1,6 - 1,7 | 800 - 850 ppm | 1,6 - 1,7 |
| Vegetative Stage 2 | 750 - 800 ppm | 1,7 - 1,8 | 850 - 900 ppm | 1,7 - 1,8 |
| Vegetative Stage 3 | 850 - 900 ppm | 1,8 - 1,9 | 900 - 950 ppm | 1,8 - 1,9 |
| Flowering Stage 1 | 900 - 950 ppm | 1,9 - 2 | 950 - 1000 ppm | 1,9 - 2 |
| Flowering Stage 2 | 950 - 1050 ppm | 2 - 2,2 | 1000 - 1050 ppm | 2 - 2,1 |
| Flowering Stage 3 | 1050 - 1100 ppm | 2,2 - 2,3 | 1050 - 1100 ppm | 2,1 - 2,2 |
| Flowering Stage 4 | 1100 - 1150 ppm | 2,3 - 2,4 | 1100 - 1150 ppm | 2,2 - 2,3 |
| Flushing | 0 - 400 ppm | 0 - 0,8 | 0 - 400 ppm | 0 - 0,8 |
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