These purple stalks are only due to one thing, and that is a phosphorus deficiency.
Phosphorus is the second important building block of the plant, and a shortage thereof in a different chemical reaction of nitrogen in the plant.
The causes of the phosphorus deficiency can be:
a temperature below 20 ° C, phosphorus moves less in the plant and almost below 17 ° C not at all anymore. The phosphorus just stands still, causing a shortage. The plant therefore hardly grows below 17 ° C. Note: A plant also grows at night and the temperature should never be lower than 20 ° C. Every time the temperature drops below it means a loss in the end yield.
- PH too high.
If the pH in the medium exceeds 6.0, the phosphorus will decrease included. If the pH in the medium exceeds 6.5, then the phosphorus will almost become completely not recorded.
- Poor plant nutrition.
have phosphorus in all kinds of different qualities and that has to do with the origin of the nutrient (from which is the phosphorus made). The quality determines the absorbability, concentration and miscibility. Most food suppliers use cheaper phosphorus leaving none high concentrations possible and they will soon bind with other substances. Consider: crystallize, poison, and crusts on the medium. Shortages are often supplemented by using a phosphoric acid as a pH.