@ The Canadian
Flushing doesn't discriminate. A flush is basically running 2 or 3 times the amount of soil you have through with water.
It depends on what you have done previously, so try to keep a log or remember what you have done.
But if you got signs of toxicity in a soilless mix while using liquid fertilizer, the procedure is to flush the plant through, bring in into the tub and run about 3 times the amount of water through it. For example a 1 gallon pot, flush 3 gallons of water and let it drain out the bottom. After you do this, you can either wait to see change, or feed it with a 25% strength solution.
If your organic soil is too hot, then you simply need to water more often, a flush might not help you in this situation, as the organic matter takes weeks or months to break down. And "flushing" in this situation would essentially be watering the soil out and replacing it in a lighter organic potting mix, I guess you could transplant to a larger container with soilless mix to dilute the strength of the soil in this situation.
Not much to go on, my bad for not replying sooner. I saw the thread but felt it was being replied to.
More info needed.
But simple answer is yes you can flush right away which would not be a bad idea. Flush it through. Then take control and add a quarter strength solution so u know at least the plant has what it needs.
Any burn damage is not going to heal. Don't remove the burnt leaves just yet, let them take the damage as act as a buffer. A couple other things you can do is reduce light intensity, and raise relative humidity about 10% to avoid further damage.