Of all the procedures we should follow when growing cannabis, none are as simple or as important as flushing the roots at the end of flowering. This simple operation, basically consisting of flooding the substrate with water, can make the difference between obtaining good or bad results from our cannabis harvest: if we haven’t washed the plants correctly they will contain residues of nutrients which will negatively affect the flavour of the smoke.
Why flush the roots at the end of flowering?
After weeks of applying nutrients to the plants, and possibly insecticide or fungicide treatments too, the growing medium may suffer from an excess of residues, principally the remains of fertilisers in the form of mineral salts. In addition, this excess of nutrients is often accentuated by over-fertilisation, due to the erroneous idea that more food will mean more flowers.
Through the metabolic processes of the plant, these mineral salts concentrated in the substrate reach the buds, reducing the flavour and quality of the resin if the plants are harvested without properly flushing, that is, without us having removed the residual nutrients from the plant and substrate.Read more...
- 31 August 2018
- Marijuana Grower's Handbook