Burmeseanswered grow question 4 years ago In my opinion about flushing
Flushing organic soil
-you don’t need to flush organic soil.They are acting like slow release fertilizer for your plants.You will not get any toxicity in organic soil as long as your soil is in proper pH range.By flushing,You only wash away minerals like beneficial bacteria and microorganisms from soil.
Flushing inorganic soil or soilless medium
-Not like the organic soil,When you flush inorganic soil or soilless medium, You will wash away everything you feed that are still in your medium.So most grower did their flushing when it comes close to harvest.By doing that, plants will only get what is left in their system and start showing deficiency.When harvest, there will be nothing left of any inorganic material and you will get nice smell and taste buds.Another time for flushing inorganic soil or soilless medium is when you see some nutrient lock out followed by toxicity.That is due to improper soil pH and excess use of nutrients.By flushing, you will get rid of what’s excess in your medium and flush until your run off ppm show 0~50ppm and pH around 6.0~6.5.After that you need to feed your plant, the right nutrients types and right concentration in right pH range.Happy Growing... ✌️