What is Flushing and When to Flush Plants?
When you flush a plant, you feed it only pH balanced water and no nutrients or fertilizers for a period of time. Flushing is especially important prior to harvesting. Nutrient residues can accumulate in buds and will give the flower an off-flavor when dried and used. Plants naturally draw nutrients to their flowers in preparation for producing seeds. If you are harvesting for flower and not seed, you will have to correct for the plant's natural tendencies by flushing. When the plant is fed only pure water in place of the nutrients, the stored minerals will be pushed out of the buds and utilized in the rest plant.